In a large bowl, mix together ground beef, Italian sausage, eggs, mushrooms, Parmesan and marinara.
Season with Italian seasoning, salt, oregano, basil, garlic, and cheese.
Press into a 9×5 inch loaf pan.
Bake in the preheated oven for 10 minutes, then remove from the oven and lower temperature to 350 degrees F and cover the meatloaf with foil. Place back into the oven for 40 minutes or until internal temperature reaches 160 degrees F (70 degrees C). Slice and serve.