Preheat oven to 375°F (190°C). Lightly grease a baking dish with olive oil or cooking spray.
Spread a thin layer of sauce on the bottom.
Arrange a single layer of ravioli, then spoon more sauce on top. Sprinkle with mozzarella and Parmesan.
Repeat layers until ingredients are used, finishing with cheese on top.
Cover with foil and bake 20 minutes. Remove foil and bake another 10–15 minutes until golden and bubbly.
Let rest 5 minutes before serving. Garnish with basil or parsley if you’re feeling fancy.