Preheat your oven to 350°F (175°C).

Cook the pasta according to package instructions until al dente. Drain and set aside.

In a large skillet, heat the olive oil over medium heat. Add the diced onion and sauté until soft, about 3-4 minutes.

Add the minced garlic to the skillet and cook for another minute until fragrant.

Stir in the ground beef, breaking it apart with a spatula. Cook until browned, about 5-7 minutes. Drain excess fat if necessary.

Add the crushed tomatoes, Italian seasoning, salt, and black pepper to the skillet. Stir well and let it simmer for about 10 minutes.

Combine the cooked pasta with the beef mixture, stirring gently to combine.

Transfer the mixture into a baking dish and spread it evenly. Top with shredded mozzarella and grated Parmesan cheese.

Bake in the preheated oven for about 20-25 minutes, or until the cheese is bubbling and golden brown.

Remove from the oven and let it cool for a few minutes before serving. Garnish with fresh basil leaves if desired.