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    Italian Sausage Stuffed Spaghetti Squash with Spinach, Tomatoes, and Mushrooms

    By Julia | Updated: Nov 09, 2023 | Published: Oct 30, 2022 | 59 Comments

    57.4K shares
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    Italian Sausage and Spinach Stuffed Spaghetti Squash is just like your favorite Italian sausage pasta! Except in this recipe, everything is stuffed into the roasted spaghetti squash! This cozy dinner is packed with veggies (spinach, tomatoes, and mushrooms). It's gluten-free and low-carb.

    Sausage Stuffed Spaghetti Squash on a baking sheet.

     

    Italian sausage stuffed spaghetti squash

    This recipe is so filling and delicious, you won't miss regular pasta at all! Spaghetti squash works great as a gluten-free and low-carb substitute for regular pasta.  It's a great meal to have on your table when the nights get cold and you crave comfort food yet want to be conscious about your calorie intake and reduce the number of carbs.

    First, the squash is roasted in the oven, and then stuffed with cooked Italian sausage, spinach, tomatoes, and mushroom mixture! Top stuffed spaghetti squash with some shredded Parmesan cheese, and put it back in the oven to melt the cheese! That's it! Your whole family will love this simple dinner and it will quickly become one of your favorites! What's even better is that Italian stuffed spaghetti squash is a simple weeknight meal that you can make year-round.

    Sausage Stuffed Spaghetti Squash with Tomatoes, Spinach, and shredded cheese on a baking sheet.

    Why make it

    • Low-carb, gluten-free recipe. If you're trying to cut back on carbs, sausage-stuffed spaghetti squash is a perfect choice! Packed with Italian sausage, spinach, mushrooms, and a small number of tomatoes this recipe is low-carb and gluten-free. It's a great alternative to regular pasta.
    • Great presentation. It's easy to make your dinner look pretty by stuffing a colorful squash with more colorful ingredients. Impress your family and friends with this easy-to-make yet fancy-looking dinner. It's a restaurant-quality meal made at home.
    • Minimal clean-up. You only need one cooking pan for cooking the filling for the squash. And, if you line the baking sheet with foil and then with parchment paper for roasting the squash, then you probably won't have to clean your baking sheet at all, or the cleaning would be minimal!
    • Great recipe for Fall/Winter. The best time to make this recipe is when spaghetti squash is in season. Take advantage of the seasonal produce and make this dish!

    Sausage Stuffed Spaghetti Squash with Tomatoes, Spinach, and melted cheese on a baking sheet.

    Main ingredients

    • Spaghetti squash is low in calories and incredibly nutritious, and a good source of folic acid, potassium, and beta-carotene.
    • Sausage. This recipe uses spicy Italian sausage which adds lots of savory flavors and a bit of spice to the squash. You can use any other type of spicy sausage. If you don't like spicy sausage, use mild or sweet Italian sausage. You can also use chicken sausage. I used crumbled sausage, however, you can use the one in casings, too - just remove the casings and crumble it as you cook it.
    • Spinach - I used fresh spinach, but frozen spinach can certainly be used! Make sure to thaw it and drain it from any liquid. I would even pat it dry with paper towels.
    • Mushrooms. You can use white button mushrooms, crimini, portobello, or shiitake.
    • Tomatoes. I used cherry tomatoes, but any fresh tomatoes would work!
    • Italian seasoning combines just the right dried herbs and is perfect for the stuffed spaghetti squash. You can also use Herbs de Provance.
    • Parmesan cheese is a must in this Italian-inspired dish!

    How to make stuffed spaghetti squash - the overview

    Here is the recipe in a nutshell with step-by-step photos. For a more detailed recipe, please scroll down to the recipe card.

    1) Roast the squash. You will need 2 medium-sized spaghetti squash. Carefully slice it in half, and scoop out the seeds. (Note: you can microwave the spaghetti squash for about 5 or 10 minutes before slicing it to soften it up. Before microwaving the squash - make large slits with a knife along the line where you will slice it in half.) You will have 4 squash halves. Roast them in the preheated oven at 400 F for about 40 minutes.

    roasted spaghetti squash on a baking sheet.

    2) Make the filling. In the meantime, you will prepare a super easy and very tasty filling by cooking spicy Italian sausage with Italian seasoning and garlic and then adding spinach, tomatoes, and mushrooms.

    cooked sausage with spinach, tomatoes, and mushrooms in a stainless steel skillet.

    3) Stuff the squash. After the spaghetti squash is roasted, stuff it with the Italian sausage and spinach filling.

    stuffed spaghetti squash with sausage, spinach, mushrooms on a baking sheet.

    4) Bake the stuffed squash. Top the spaghetti squash with shredded Parmesan cheese, and reheat it in the oven (or under the broiler) briefly until the cheese melts. That's it!

    stuffed spaghetti squash with sausage, spinach, mushrooms, shredded cheese on a baking sheet.

    stuffed spaghetti squash with sausage, spinach, mushrooms, Parmesan cheese on a baking sheet.

    Variations, substitutions, and recipe notes

    • Microwave the whole spaghetti squash before slicing it in half. Microwave it for about 10 minutes or longer to soften it before you slice it in half. Make large slits in a squash with a knife along the line where you will slice it before adding it to the microwave oven.
    • Can you make it meatless? Yes, use plant-based sausage, such as the Beyond Sausage brand. Or, simply use more mushrooms (Portobellos work especially well!) and exclude regular sausage.
    • Greens. You can use spinach, kale, or Swiss chard.
    • Add spice. Sausage-stuffed spaghetti will benefit from a bit of heat. Use red pepper flakes or Cayenne pepper to spice up this dish, especially if the sausage is not spicy.
    • Fresh herbs are so important in this recipe! They truly make or break it!  I use fresh thyme, and it adds a lot of flavor to this Fall sausage dinner.  I used ¼ of an ounce - or just a few sprigs of fresh thyme.  The more, the better!  I would not recommend using dried thyme.  But if you do use it, use a much smaller quantity.
    • Toppings. When serving, top the stuffed squash with more grated cheese (Parmesan, Pecorino Romano, or Asiago), fresh herbs, green onions, red pepper flakes, or cracked black pepper.

    Storage and reheating tips

    • Fridge. Refrigerate the leftover stuffed spaghetti squash in an airtight container for up to 5 days.
    • Reheat in the oven. Reheat it in the preheated oven at 350 F for about 30 minutes.
    • Reheat in the microwave oven. You can also microwave the leftovers. For the best and fastest results, you can take the sausage mixture out of the squash, and reheat this mixture and the squash separately. Then stuff this mixture back into the spaghetti squash.

    What to serve with it

    Simple, colorful, vibrant, and delicious Fall-themed salads are a perfect combination with stuffed spaghetti squash. Here are my favorites:

    • Arugula Salad with Apples, Cranberries, Pecans, and Balsamic Dressing
    • Cranberry Spinach Salad with Cashews and Goat Cheese and Lemon-Honey Poppy Seed Dressing
    • Autumn Salad with Arugula, roasted Butternut Squash, dried Figs, toasted sliced Almonds, and Pomegranate Seeds.
    • Simple Spinach Salad with Pine Nuts, Parmesan Cheese
    • Arugula Salad with Pears, Apples, and Cashews

    Other spaghetti squash recipes you might like

    • Southwestern Spaghetti Squash with Chicken
    • Parmesan Spaghetti Squash, Spinach, and Bacon with Pine Nuts
    • Bacon, Spaghetti Squash, and Parmesan Fritters
    • Parmesan Zucchini and Spaghetti Squash with Pine Nuts
    Italian Sausage Stuffed Spaghetti Squash with Tomatoes, Spinach, and melted cheese on a baking sheet.
    4.77 from 182 votes

    Italian Sausage and Spinach Stuffed Spaghetti Squash

    Italian Sausage and Spinach Stuffed Spaghetti Squash is just like your favorite Italian sausage pasta! Except in this recipe, everything is stuffed into the roasted spaghetti squash! This cozy dinner is packed with veggies (spinach, tomatoes, and mushrooms). It's completely gluten-free, low-carb, and keto-friendly!
    Print Recipe Pin Recipe Save RecipeSaved!
    Prep Time 20 minutes mins
    Cook Time 40 minutes mins
    Total Time 1 hour hr
    Course Main Course
    Cuisine American, Italian, Mediterranean
    Servings 6 people
    Calories per serving 561 kcal
    Author: Julia

    Ingredients

    Spaghetti squash

    • 2 spaghetti squash medium size
    • 2 tablespoons olive oil
    • salt and pepper

    Stuffing

    • 1 tablespoon olive oil
    • 16 oz spicy Italian sausage crumbled
    • 8 oz mushrooms sliced
    • ½ teaspoon Italian seasoning or Herbs from Provence
    • 4 cloves garlic minced
    • red pepper flakes
    • 10 oz spinach
    • 5 oz cherry tomatoes sliced
    • 6 oz Parmesan cheese shredded
    • fresh thyme for garnish
    US Customary - Metric
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    Instructions 

    How to roast spaghetti squash

    • Preheat oven to 400 Fahrenheit. Line the baking sheet with parchment paper.
    • Cut the squash in 2 halves, scrape out the seeds and the fiber out of each half. Repeat with a second squash.
    • (Note: before cutting each squash, you can microwave it. In this case, make large slits with a knife in a spaghetti squash along the line where you will slice it in half. Then, microwave the whole squash for about 5 or 10 minutes to soften it a bit. Then cut each squash in half.)
    • Drizzle olive oil over the cut sides and inside of the squash. Generously season with salt and pepper.
    • Place the 4 squash halves on the prepared baking sheet cut side down.
    • Bake for about 30 or 40 minutes on the middle rack. Remove it from the oven when it's cooked through and soft. You can check by pulling the baking sheet out of the oven and piercing the squash with the fork - it should be soft.
    • Proceed with the rest of the recipe while the squash is in the oven.

    Make the stuffing

    • Make the stuffing while the spaghetti squash is roasted in the oven. Heat 1 tablespoon of olive oil on medium heat in a large, high-sided skillet.
    • Add crumbled sausage and sliced mushrooms and cook on medium heat for about 5 minutes or until the sausage is cooked. Drain excess fat if you like. Or, you could leave it in since you will be adding a lot of spinach to be wilted in the same skillet.
    • Add minced garlic, Italian seasoning, red pepper flakes, and chopped tomatoes (reserving some for later use).
    • Add fresh spinach in batches to the sausage mixture and cook until the spinach wilts.

    How to stuff spaghetti squash

    • By this time, you have roasted the spaghetti squash for 30 or 40 minutes. Remove it from the oven and turn cooked squash halves cut sides up.
    • Let it cool slightly.
    • Divide the Italian sausage mixture among the 4 halves and stuff the squash until the mixture is leveled. Top with the remaining sliced cherry tomatoes and the shredded Parmesan cheese.
    • Return stuffed spaghetti squash to the preheated oven and roast at 400 F for 15 more minutes until the cheese mixture melts.
    • When serving, top with fresh thyme.

    Nutrition

    Nutrition Information
    Italian Sausage and Spinach Stuffed Spaghetti Squash
    Amount per Serving
    Calories
    561
    % Daily Value*
    Fat
     
    40
    g
    62
    %
    Saturated Fat
     
    15
    g
    94
    %
    Polyunsaturated Fat
     
    5
    g
    Monounsaturated Fat
     
    18
    g
    Cholesterol
     
    77
    mg
    26
    %
    Sodium
     
    1104
    mg
    48
    %
    Potassium
     
    1011
    mg
    29
    %
    Carbohydrates
     
    28
    g
    9
    %
    Fiber
     
    7
    g
    29
    %
    Sugar
     
    11
    g
    12
    %
    Protein
     
    26
    g
    52
    %
    Vitamin A
     
    5157
    IU
    103
    %
    Vitamin C
     
    28
    mg
    34
    %
    Calcium
     
    480
    mg
    48
    %
    Iron
     
    4
    mg
    22
    %
    * Percent Daily Values are based on a 2000 calorie diet.

    Nutrition Disclaimer:

    The nutritional information on this website is only an estimate and is provided for convenience and as a courtesy only. The accuracy of the nutritional information for any recipe on this site is not guaranteed. It should not be used as a substitute for a professional nutritionist’s advice.

    Keyword sausage stuffed spaghetti squash, stuffed spaghetti squash
    Tried this recipe?Be sure to leave a comment and provide a Star Rating below - I love your feedback and try to respond to every comment!
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    Comments

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      Recipe Rating




    1. Joan

      December 02, 2024 at 10:56 pm

      I made this recipe for the third time tonight. My husband and I really love the flavors and texture.
      This recipe is a full-9; winner!

      Reply
    2. Kathryn Tucker

      November 10, 2024 at 5:40 pm

      I fixed this recipe as I've been low carb for several months. It was fantastic! The best part is my husband loved it also so it was a meal that both of us could enjoy. I did add chopped vidalia onions and sweet red and orange bell peppers. Also used Portabella mushrooms. Thanks so much for the great recipe.

      Reply
      • Julia

        November 10, 2024 at 7:43 pm

        You’re very welcome, Kathryn! I love that you added onions and bell peppers—they are perfect additions!

        Reply
    3. Carry Post

      November 05, 2024 at 3:15 pm

      This recipe is beyond fantastic. Even my husband, who typically eats the stuffing of recipes like this but leaves the squash, ate EVERYTHING! It was absolutely delicious. The combination of sausage, mushrooms and spinach is wonderfully tasty - I'm sensitive to dairy so I held back on the cheese and mine was delicious too. Thanks Julia. I also love your orzo recipes. In fact, I'm not sure I ever cooked orzo before discovering your blog and now it's a staple in our house.

      Reply
      • Julia

        November 09, 2024 at 11:31 pm

        Thank you for taking the time to leave such a great review, Carry—it truly made my day! I'm so glad you enjoy my orzo recipes as well!

        Reply
    4. Dlg

      October 29, 2024 at 7:19 pm

      Absolutely delicious! I've made it in the squash as the picture shows and I also made it in a casserole dish, mixed altogether with cheese on top... everyone loved it. Thanks for this tummy recipe definitely will be making this agai and again.

      Reply
      • Julia

        November 10, 2024 at 12:39 am

        Thank you, Dig, for your wonderful review and the 5-star rating! 🙂 So glad the recipe was a hit! 😉

        Reply
    5. Rob N.

      October 21, 2024 at 8:23 am

      Great recipe! I halved the recipe for one squash that was on the smaller side and ended up with more sausage filling than could fit in the squash. I scooped the squash out and layered it in a 9x9 pan with the filling plus mozzarella, topped with cheese and bread crumbs and baked then broiled. Ended up with a sausage and spaghetti squash casserole that was easy to make and delicious!

      Reply
      • Julia

        October 26, 2024 at 10:14 pm

        I love your casserole twist on this dish, Rob! Thanks for sharing it with everyone! 🙂

        Reply
    6. dana

      October 06, 2024 at 8:25 pm

      Delicious recipe…made it as described. Healthy and so yummy! Thank you

      Reply
      • Julia

        October 18, 2024 at 12:08 am

        I am so glad it turned out well!! Thanks for your review, Dana. 🙂

        Reply
    7. Nikki

      June 29, 2024 at 12:00 am

      This is absolutely delicious..I make it quite often. We love it

      Reply
      • Julia

        July 23, 2024 at 5:23 am

        Thank you, Nikki, for taking the time to share your review! 🙂

        Reply
    8. DSecrest

      January 26, 2024 at 10:09 am

      Wow! No like WOW. I have been cooking all month & wanted to mix it up. This did the trick. Not only easy, but very delicious. My biggest question is why am I just trying out spaghetti squash so late in life? This will be on the rotation.

      Reply
      • Julia

        January 28, 2024 at 12:41 am

        Thank you for you rave review - it means so much to me! 🙂 I am glad this recipe gave you a new appreciating for the spaghetti squash! ❤️ I have quite a few other spaghetti squash recipes you might like:

        https://juliasalbum.com/category/vegetables/spaghetti-squash/

        Reply
      • Susan Miller

        February 14, 2024 at 11:16 am

        Sounds delicious! I love your recipes. I have never cooked Spaghetti Squash and want to make this, but I am a little confused. Are you scooping out what people refer to as the "noodles" when you cut it in half and before it is baked? Are the "noodles" not used in this recipe?

        Reply
        • Julia

          February 14, 2024 at 8:27 pm

          Susan, no, at the very start of the recipe, I am scooping up the inedible strands + seeds, leaving the edible "noodles" intact along the walls of the spaghetti squash. Then, I roast the spaghetti squash to cook those "noodles" within the squash.

          Once it's stuffed, I cut each spaghetti squash half in half, and serve it in a squash shell in deep pasta bowls, where you can scoop out the edible flesh along the walls of the spaghetti squash shell together with the filling.

          Alternatively, you can scoop out the cooked spaghetti squash flesh and mix it with the stuffing in a deep pasta bowl, without serving it in a shell.

          Reply
    9. Donna

      November 22, 2023 at 9:05 pm

      I loved the recipe but wonder if the half squash already filled can be frozen and if so, how? Thanks!

      Reply
      • Julia

        November 23, 2023 at 2:18 pm

        Donna, this freezes really well. There are 2 ways to freeze it:

        1) Carefully add the whole stuffed squash into a clean freezer bag, close it air-tight, and place it in a freezer so that it keeps everything intact.

        2) Scoop out the cooked spaghetti squash (together with the stuffing) and freeze that in an air-tight freezer-safe container.

        Reply
    10. Kevin

      November 15, 2023 at 10:56 pm

      I have a question, how do you serve the finished product? Normally you just shred the squash to "spaghetti "but with this recipe that wouldn't work, or does it?

      Reply
      • Julia

        November 16, 2023 at 11:50 am

        Kevin, you can slice each stuffed half in half and serve it in deep pasta bowls. Use a for or spoon to scoop out the cooked spaghetti squash flesh together with the stuffing with each bite. That's what I like to do.

        Or, scoop out all the edible stuff into a pasta bowl, and mix everything together. Enjoy! 🙂

        Reply
    11. Barbara

      November 07, 2023 at 6:29 pm

      I have never left a comment before but definitely needed to for this recipe. I made it a couple of days ago and it the excellent. I followed to recipe exactly. My husband and I both loved it. Thanks. Will be making this again, most definitely.

      Reply
      • Julia

        November 08, 2023 at 12:12 pm

        Barbara, I am so happy both of you loved it and will make it again! 🙂 Thank you for taking the time to share your review! ❤️

        Reply
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    Hi, I'm Julia!

    I am a full-time food blogger living in beautiful Colorado. I focus primarily on savory recipes (protein-based & fiber-rich main dishes, pasta, salads) using fresh & seasonal ingredients. A food blogger since 2012, I help home cooks create well-balanced and visually appealing dinners (many of which are 30-minute ONE-PAN meals). Find out more about me and my cooking philosophy. 

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