Creating your Spaghetti Casserole is straightforward if you follow these simple steps:

1. Preheat Oven: Preheat your oven to 350°F (175°C).
2. Cook Spaghetti: Boil a large pot of salted water. Add the spaghetti and cook until al dente, approximately 8-10 minutes. Drain and set aside.
3. Cook Meat: In a large skillet, brown the ground beef over medium heat. Season with salt, pepper, garlic powder, and onion powder. Drain excess grease.
4. Mix Ingredients: In a large bowl, combine the cooked spaghetti, browned meat, marinara sauce, ricotta cheese, and Italian seasoning. Stir until well combined.
5. Layer Casserole: In a greased 9×13-inch baking dish, spread half of the spaghetti mixture evenly. Sprinkle half of the mozzarella and Parmesan cheese on top.
6. Add Remaining Mixture: Layer the remaining spaghetti mixture on top, then finish with the remaining mozzarella and Parmesan cheese.
7. Bake: Place the casserole in the preheated oven and bake for 25-30 minutes, or until the cheese is bubbly and golden.
8. Cool: Remove from the oven and allow to cool for about 5 minutes before serving.
9. Garnish: Optionally, sprinkle with fresh basil or parsley before serving for a pop of color and freshness.

These steps will lead you to a delicious Spaghetti Casserole that is sure to impress!