Step 1: Preheat the Oven

Preheat your oven to 375°F (190°C) to ensure it’s ready for baking the spaghetti casserole.

Step 2: Cook the Spaghetti

Fill a large pot with water, bring it to a boil, add a pinch of salt, and then add the spaghetti noodles. Cook according to the package instructions until al dente, usually about 8-10 minutes. Once cooked, drain the spaghetti and set it aside.

Step 3: Brown the Meat

While the spaghetti cooks, place a large skillet over medium heat. Add the ground beef or turkey, breaking it apart with a spoon. Season with garlic powder, onion powder, red pepper flakes, salt, and pepper to taste. Cook until the meat is thoroughly browned and no longer pink. Drain any excess grease.

Step 4: Combine with Sauces

In the pot used for the spaghetti (now empty), mix the cooked meat, cooked spaghetti, marinara sauce, and half of the Alfredo sauce until everything is evenly coated.

Step 5: Layer the Casserole

Spread half of the spaghetti mixture into a large baking dish. Drizzle the remaining Alfredo sauce over this layer, then sprinkle one cup of mozzarella cheese on top. Add the remaining spaghetti mixture, and top with the remaining mozzarella cheese.

Step 6: Bake

Place the baking dish in the preheated oven and bake for about 20-25 minutes, or until the cheese on top is bubbly and slightly golden.

Step 7: Cool and Serve

Once baked, remove the dish from the oven and let it cool for a few minutes. This rest period allows the spaghetti casserole to set, making it easier to serve.

Step 8: Enjoy

Serve warm, optionally garnished with fresh parsley or basil for a touch of color and flavor.