1. Preheat Oven

• Set your oven to 375°F (190°C) and lightly grease a 9×13-inch baking dish.

2. Cook the Beef

• In a large skillet over medium heat, brown the ground beef until fully cooked.

• Drain the excess fat to avoid a greasy sauce.

3. Sauté Onion & Garlic

• Add chopped onion and garlic to the skillet.

• Sauté for about 3–4 minutes, until softened and fragrant.

4. Make the Sauce

• Stir in the marinara sauce, diced tomatoes, oregano, basil, salt, and pepper.

• Simmer uncovered for 10 minutes, stirring occasionally.

5. Cook the Pasta

• While the sauce simmers, cook the spaghetti until al dente according to the package.

• Drain and set aside.

6. Combine Pasta and Sauce

• Add the cooked spaghetti to the skillet with the meat sauce.

• Toss well to evenly coat the pasta.

7. Transfer to Baking Dish

• Pour the spaghetti mixture into your prepared baking dish.

• Sprinkle mozzarella and Parmesan cheese evenly on top.

8. Bake

• Bake for 20–25 minutes, or until the cheese is melted, bubbly, and golden on top.

9. Serve

• Let sit for 5–10 minutes before serving.

• Garnish with fresh parsley if desired.