Chicken Meatball Casserole

Name: Chicken Meatball Casserole
Ingredients: Nonstick cooking spray, for the baking sheet and baking dish; 1 pound ground chicken; 1/2 cup canned pumpkin; 1/3 cup grated Parmesan; 1/4 cup grated yellow onion; 2 tablespoons minced fresh parsley; 1 teaspoon kosher salt; 1/2 teaspoon freshly ground black pepper; 2 cloves garlic, minced; Kosher salt; One 16-ounce box mezzi rigatoni or mezze penne; One 24-ounce jar marinara sauce; 2 cups shredded mozzarella; 1/4 cup finely grated Parmesan, plus more for serving