Grease a deep 9x13 baking dish with cooking spray and set aside.
Ricotta Filling
In a medium bowl, add the ricotta, beaten egg, Parmesan cheese, garlic powder, and Italian seasoning. Stir to combine then set aside.
Meat Sauce
In a large skillet over medium heat, add the ground beef, ground sausage and onions.
Cook until the meat has browned and the onion is soft, about 15 minutes, then drain the fat.
Stir in the garlic and sauté for 1-2 minutes until the garlic is browned and fragrant.
Stir in the four cheese sauce.
Reduce the heat to low and simmer the mixture for 2-3 minutes, then turn off the heat.
Assembling the Lasagna
Spread 1/4 of the meat sauce into the bottom of the prepared pan.
Top with a single layer of ravioli ( 15 total)
Place another 1/4 of the meat sauce on top of the ravioli.
Spread out the ricotta cheese mixture on top of the meat sauce.
Top with 1 cup shredded mozzarella.
Place another 1/4 of the meat sauce on top, followed by another layer of ravioli.
Place the last of the meat sauce on top then top with the remaining 2 cups mozzarella.
Cover the pan loosely with aluminum foil and bake for 60 minutes. Remove the foil and continue to bake until golden and bubbly, around 15 minutes. Remove and let stand for 15 minutes.
Top with the fresh basil to serve.
Video
Notes
If you buy fresh pasta, simply throw it into the freezer and freeze it before baking. Using frozen ravioli allows the lasagna to cook longer, letting the flavors meld together better and layers to blend together nicely.