Creating Beef Lombardi Casserole is simple if you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Cook Ground Beef: In a large skillet, brown the ground beef over medium heat until no longer pink. Drain excess fat.
3. Add Onion and Garlic: Add the chopped onion and minced garlic to the skillet. Cook until the onion is translucent.
4. Stir in Sauces: Add the tomato sauce, diced tomatoes, Italian seasoning, salt, and pepper. Mix well and simmer for about 5 minutes.
5. Mix in Pasta: Stir in the cooked pasta, combining thoroughly with the beef mixture.
6. Prepare Casserole Dish: In a separate bowl, combine the cottage cheese, half of the mozzarella cheese, and half of the Parmesan cheese.
7. Layer Ingredients: Begin layering in a 9×13-inch casserole dish. Start with half of the beef and pasta mixture, then add a layer of the cheese mixture, followed by the remaining beef and pasta.
8. Top with Cheese: Sprinkle the remaining mozzarella and Parmesan cheese generously on top.
9. Bake: Cover with aluminum foil and bake in the preheated oven for 30 minutes. After that, remove the foil and bake for an additional 15 minutes or until the cheese is bubbly and golden.
10. Let it Rest: Once baked, allow the casserole to sit for 10 minutes before serving.

Your Beef Lombardi Casserole is now ready to delight your taste buds!