Preheat oven to 350 degrees F. Cook ravioli according to package directions. Meanwhile, combine pasta sauce and meatball pieces in medium saucepan; cook over medium heat 8 minutes, or until heated through, stirring occasionally.
Spray 13x9-inch baking dish with cooking spray.
Drain ravioli; spread onto bottom of prepared dish. Top with the spaghetti sauce mixture; sprinkle with cheese. Cover with aluminum foil.
Bake 20 minutes, or until ravioli mixture is heated through and cheese is melted.
