Heat a large skillet over medium-high heat. Coat pan with cooking spray. Add sausage, beef, and garlic; cook 4 minutes or until meat is browned, stirring frequently to crumble. Stir in marinara sauce, salt, and pepper; bring just to a simmer. Remove from heat. Stir in frozen ravioli; toss to combine.
Coat an 8-inch square broiler-safe glass or ceramic baking dish with cooking spray. Spoon ravioli mixture into pan; top evenly with mozzarella cheese. Cover dish tightly with foil coated with cooking spray. Bake at 375° for 40 minutes. Uncover and sprinkle evenly with Parmigiano-Reggiano cheese.
Preheat broiler (leave dish in oven). Broil 3 minutes or until cheese is bubbly and lightly browned.