1Heat oven to 350°F. Spray bottom and sides of rectangular baking dish 13x9x2-inches, with cooking spray.
2Spread 3/4 cup of the pasta sauce in baking dish. Arrange half of the frozen ravioli in single layer over sauce; top with half of the remaining pasta sauce and 1 cup of the mozzarella cheese. Repeat layers once, starting with ravioli. Sprinkle with Parmesan cheese.
3Cover with aluminum foil and bake 40 minutes. Remove foil; bake uncovered 15 to 20 minutes longer or until bubbly and hot in center. Let stand 10 minutes before cutting.