Making Million Dollar Spaghetti is simple when you follow these steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Boil Pasta: Cook the spaghetti according to package instructions until al dente. Drain and set aside.
3. Cook Meats: In a large skillet, brown the ground beef and Italian sausage over medium heat until fully cooked. Drain excess fat.
4. Add Vegetables: Add the chopped onion and minced garlic to the skillet. Sauté until the onion becomes translucent.
5. Combine Sauces: Stir in the marinara sauce and Italian seasoning. Let the mixture simmer for about 5 minutes.
6. Layer Ingredients: In a 9×13-inch baking dish, spread half of the cooked spaghetti. Layer half of the meat sauce over it, and then dollop half of the cottage cheese. Sprinkle with a cup of mozzarella cheese and some Parmesan.
7. Repeat Layers: Add the remaining spaghetti, followed by the rest of the meat sauce. Finish with the remaining cottage cheese, mozzarella, and Parmesan.
8. Bake: Cover the dish with aluminum foil and bake in the preheated oven for 30 minutes. Remove the foil and bake for an additional 15 minutes or until the cheese is bubbly and slightly golden.
9. Cool: Once finished, take the dish out of the oven and let it cool for 10-15 minutes.
10. Garnish: Sprinkle fresh basil on top for added flavor before serving.

These steps will help you create a sumptuous Million Dollar Spaghetti that is sure to impress.