Creating Ravioli Lasagna is a straightforward process. Follow these steps to prepare a delicious meal:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Mix Ricotta Filling: In a bowl, combine ricotta cheese, egg, Italian seasoning, salt, and pepper. Mix until smooth.
3. Layer Marinara: Spread a thin layer of marinara sauce on the bottom of a 9×13-inch baking dish.
4. Add Ravioli: Place a layer of ravioli over the sauce, ensuring they are evenly spread.
5. Spread Ricotta Mixture: Spoon dollops of the ricotta mixture over the ravioli, spreading it gently with a spatula.
6. Sprinkle Cheese: Next, sprinkle a layer of mozzarella and Parmesan cheese over the ricotta.
7. Repeat Layers: Repeat the layering process until you run out of ingredients, finishing with sauce and a generous layer of mozzarella on top.
8. Cover: Cover the baking dish with aluminum foil to protect the cheese from burning.
9. Bake: Place in the preheated oven and bake for 25 minutes.
10. Uncover and Brown: Remove the foil and bake for an additional 10-15 minutes until the cheese is bubbly and golden.
11. Cool: Allow the lasagna to cool for about 10 minutes before slicing.

These simple steps will guide you in creating a Ravioli Lasagna that is both satisfying and delicious.