1. Preheat oven to 425°F. Spray 8 x 8-inch baking dish with cooking spray. Place 1/3 of ravioli, 1/3 of pasta sauce and 1/3 of cheese evenly in bottom of prepared baking dish.
2. Repeat layers two more times, beginning with ravioli and ending with cheese.
3. Bake covered 20 minutes Uncover and bake additional 10 minutes or until hot and bubbly, and cheese is melted. Let stand 5 minutes before serving.