Brush chicken thighs thoroughly with melted butter. Arrange chicken in a medium-size baking pan.
Sprinkle minced garlic over and around the chicken thighs.
Add lemon slices and capers around the chicken thighs.
Add chicken broth to the bottom of the baking pan, without pouring it over the chicken thighs (chicken thighs should only have butter brushed over them - to make the skin crispy). Sprinkle salt and pepper on top.
Bake the chicken until completely cooked through and the skin on top is golden brown and crispy, for about 30 minutes. Internal temperature should register 175 degrees F.
To serve, spoon caper mixture over chicken. Sprinkle with finely chopped green onions.