Creating Ravioli Lasagna can be straightforward if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Mix Ricotta Filling: In a large bowl, combine ricotta cheese, egg, Italian seasoning, garlic powder, salt, and pepper. Mix well until smooth.
3. Prepare Baking Dish: Spread a thin layer of marinara sauce on the bottom of a 9×13-inch baking dish.
4. Layer Ravioli: Place half of the ravioli on top of the sauce in a single layer.
5. Spread Ricotta Mixture: Spoon half of the ricotta mixture over the ravioli, spreading it evenly.
6. Add Sauce: Pour half of the remaining marinara sauce over the ricotta layer, followed by a layer of mozzarella cheese.
7. Repeat Layers: Repeat the layering process with the remaining ravioli, ricotta mixture, marinara sauce, and mozzarella cheese.
8. Top with Parmesan: Sprinkle grated Parmesan cheese over the top layer of mozzarella.
9. Cover and Bake: Cover the baking dish with aluminum foil and bake in the preheated oven for 30 minutes.
10. Uncover and Brown: Remove the foil and bake for an additional 15-20 minutes, or until the top is golden and bubbly.
11. Cool and Serve: Once done, remove from the oven and let it cool for 10-15 minutes before slicing. Garnish with fresh basil if desired.

These steps will guide you in creating this incredible Ravioli Lasagna effortlessly.