Instructions:

1. Preheat the oven to 375°F (190°C). Grease a 9×13-inch baking dish.
2. Cook spaghetti according to package instructions until al dente. Drain and set aside.
3. In a large bowl, combine ground beef, breadcrumbs, Parmesan cheese, parsley, egg, garlic, salt, and pepper. Mix until well combined.
4. Shape the mixture into meatballs, about 1 inch in diameter.
5. In a large skillet, heat olive oil over medium heat. Add meatballs and cook until browned on all sides, about 5 minutes. Remove from skillet and set aside.
6. In the same skillet, add chopped onion and bell pepper. Cook until softened, about 5 minutes.
7. Return meatballs to skillet and add marinara sauce. Stir to coat meatballs evenly with sauce.
8. In the prepared baking dish, spread half of the cooked spaghetti. Top with half of the meatball mixture. Repeat layers with remaining spaghetti and meatballs.
9. Sprinkle shredded mozzarella cheese evenly over the top.
10. Bake in the preheated oven for 25-30 minutes, or until the cheese is melted and bubbly.
11. Remove from the oven and let it cool for a few minutes before serving.
12. Serve your delicious Baked Spaghetti with homemade meatballs hot, garnished with fresh parsley if desired.

Enjoy this comforting and satisfying meal with your family and friends, perfect for any occasion!

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