1 package lasagna noodles, cooked according to package directions, cooled
1 pound ground beef
1 pound ground Italian sausage
1 small onion, diced
16 ounces diced mushrooms (store-bought canned, fresh or home canned)
2 jars spaghetti sauce (store bought or home canned)
1 8-ounce can tomato paste (I used Italian-seasoned tomato paste)
8 ounces ricotta cheese or small-curd cottage cheese
1 egg, slightly beaten
1/2 cup grated Parmesan cheese
1 teaspoon garlic powder
1 teaspoon parsley leaves
1 teaspoon Italian seasoning
1/2 teaspoon salt
1 package fresh spinach leaves, washed and patted dry
2 cups shredded Italian cheese blend
2 cups shredded mozzarella cheese, divided
8 ounces sliced Provolone cheese
Freshly grated Asiago cheese
Freshly grated Parmesan cheese

Cook lasagna noodles per package directions. Set aside.

In a large skillet, brown ground beef and Italian sausage with the diced onions until the meat is no longer pink. Drain grease. In the same skillet, to the browned meat add 1 jar of spaghetti sauce, the tomato paste and the mushrooms. Cook until the mixture thickens.

In a large bowl, combine the ricotta or cottage cheese, egg, 1/2 cup Parmesan cheese, garlic powder, parsley, Italian seasoning and salt. Stir until well combined.

Combine the 2 cups of Italian shredded cheese and 1 cup of the shredded mozzarella cheese in another bowl.

In a large lasagna pan, layer the bottom with cooked lasagna noodles. Spoon some of the meat mixture on top of the noodles. Add a layer of the sliced Provolone cheese. Add a layer of the ricotta/egg mixture over the sliced Provolone. Add a layer of spinach leaves. Add a layer of the combined shredded cheeses.

Repeat layers, starting with another layer of noodles, and continue until you’ve used all the noodles, meat mixture, ricotta cheese mixture, spinach and combined shredded cheeses.

After you’ve completed all the layers, pour the remaining 1 jar of spaghetti sauce over all the layers. Top the sauce with the remaining 1 cup of shredded mozzarella cheese and additional freshly grated Asiago and Parmesan cheeses, if desired.

Bake the lasagna in a 350 degrees Fahrenheit oven for about 60 minutes, or until the cheese is browned and the lasagna is bubbly.

Serve with additional grated Parmesan and Asiago cheeses.