Preheat the oven to 350F.
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Spoon a layer of creamy tomato sauce into a 9 x 13-inch casserole dish, and spread it along the bottom. Then arrange the ravioli out in a single layer over the sauce.
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On the last layer, spread over the rest of the mozzarella and Parmesan.
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Cover with foil and place into the preheated oven to bake for 25 minutes covered, gently remove the foil, and then bake for another 15 minutes until the cheese is bubbly and golden brown.
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