Preheat the oven to 375F
For the meat layer:
In a large pot over medium high heat, brown and crumble the sausage and ground beef with the onion and garlic. Season with salt and pepper. Stir in the marinara. Remove from the heat and set aside.
For the ricotta layer:
mix together the ricotta, eggs, Italian seasoning, garlic, and 1 cup of the parmesan cheese.
Assemble the lasagna:
In a large 9x13 casserole, layer half of the meat mixture in the bottom.
layer all of the ricotta mixture on top
Now the rest of the meat mixture goes on top of the ricotta mixture
Finish off by sprinkling the mozzarella and the remaining 1/2 cup of parmesan.
Bake in the pre-heated oven for 30 minutes.
Remove from oven and serve.