In a large pot, bring salted water to a boil. Add the ravioli and cook according to package instructions until al dente. Drain and set aside.
In a mixing bowl, combine ricotta cheese, egg, garlic powder, onion powder, salt, pepper, and half of the chopped parsley. Stir until well incorporated.
Spread a thin layer of marinara sauce on the bottom of a 9x13 inch baking dish.
Layer half of the cooked ravioli, half of the ricotta mixture, and half of the mozzarella cheese. Repeat with remaining ingredients, finishing with marinara sauce and a topping of mozzarella and Parmesan cheese.
Cover the baking dish with aluminum foil and bake for 25 minutes. Remove foil and bake for an additional 15 minutes until cheese is bubbly and golden brown.
Let the lasagna rest for about 10 minutes before slicing and serving. Garnish with remaining parsley.
Notes
Feel free to customize with vegetables, different sauces, or meat options for added flavor.