Set your oven to 350°F (175°C) and let it warm up while you prepare the dish.

Boil a large pot of salted water and cook the spaghetti according to package directions until al dente. Drain the spaghetti using a colander and set it aside.

If you’re adding ground beef, cook 1 pound in a skillet over medium heat until fully browned. Drain any excess fat.

In a large bowl, mix together 2 cups of marinara sauce, the cooked ground beef, 1 teaspoon Italian seasoning, 1/2 teaspoon garlic powder, 1/2 teaspoon salt, and 1/4 teaspoon black pepper.

Add the cooked spaghetti into the sauce mixture and toss until fully coated. Lightly grease a 9×13-inch baking dish to prevent sticking. Pour the spaghetti mixture into the dish, spreading it evenly.

Sprinkle 2 cups of shredded mozzarella over the top. Add 1 cup of grated Parmesan cheese evenly across the dish. Cover the baking dish with aluminum foil and bake for 20 minutes.

Remove the foil and bake for another 10 minutes until the cheese is golden and bubbly. Let the spaghetti sit for a few minutes before slicing. Serve warm and enjoy!