Spinach Stuffed Shells with Mini Turkey Meatballs

Preheat oven to 350 degrees F. In a large pot of salted boiling water, cook pasta shells until al dente. Drain, then let cool. Meanwhile, make meatballs: In a large bowl, combine ground turkey, bread crumbs, Parmesan, garlic, parsley, and crushed red pepper flakes and season with salt and pepper. Bake until golden brown and cooked through, 10 to 12 minutes. In a large bowl, stir together ricotta, mozzarella, and spinach and season with salt and pepper. Pour 1/4 cup sauce in bottom of oven-proof skillet or baking dish. Stuff shells with ricotta mixture and meatballs and arrange in dish and spoon over remaining sauce. Bake until shells are hot and bubbly, 15 to 20 minutes.