
This easy Dump-and-Bake Ravioli Casserole is a quick dinner with just 4 ingredients and 5 minutes of prep!
Preheat oven to 400° F. Spray a 9-inch by 13-inch baking dish (or two 8-inch dishes) with cooking spray.
Pour a very thin layer of marinara sauce into the prepared baking dish to cover bottom (about ½ cup).
Arrange half of the frozen ravioli in a single layer over the sauce.
Top with half of the remaining marinara sauce and half of the mozzarella cheese.
Repeat layers once, starting with ravioli. Sprinkle Parmesan cheese on top.
Cover with aluminum foil and bake for 20 minutes. Remove foil and bake, uncovered, for 20-25 more minutes or until bubbly and hot in center. Let stand 10 minutes before serving.