Creating this Million Dollar Lasagna involves a straightforward process. Follow these steps for a scrumptious outcome:

1. Preheat the Oven: Begin by preheating your oven to 375°F (190°C).
2. Cook the Meat: In a large skillet, cook the ground beef and Italian sausage over medium heat until browned. Drain any excess fat.
3. Add Vegetables: Stir in the diced onions and minced garlic. Cook until softened, about 5 minutes.
4. Incorporate Sauce: Add the marinara sauce to the skillet. Season with Italian seasoning, salt, and pepper. Let simmer for 10 minutes.
5. Prepare the Cheese Mixture: In a bowl, combine ricotta cheese, egg, and half of the grated parmesan. Mix well.
6. Cook Noodles: In a pot of salted boiling water, cook lasagna noodles according to package instructions until al dente. Drain and lay them flat on a clean kitchen towel.
7. Layer the Lasagna: In a 9×13-inch baking dish, spread a thin layer of meat sauce on the bottom. Place a layer of noodles over the sauce, followed by a layer of the ricotta mixture, a layer of meat sauce, and a layer of mozzarella cheese.
8. Repeat Layers: Continue layering noodles, ricotta mixture, meat sauce, and mozzarella until all ingredients are used. Finish with a layer of noodles topped with remaining meat sauce and a generous sprinkling of mozzarella and parmesan cheese.
9. Cover and Bake: Cover the baking dish with aluminum foil, ensuring it doesn’t touch the cheese. Bake for 25 minutes, then remove the foil and bake for an additional 20 minutes, or until the cheese is bubbly and golden.
10. Cool Before Serving: Remove the lasagna from the oven and let it cool for about 15 minutes before slicing. This allows the layers to set and makes serving easier.

These steps will guide you through making your own incredible Million Dollar Lasagna, ensuring success for any occasion.