1. Preheat oven to 375°F (190°C).

2. Cook the pasta in salted boiling water until al dente, then drain and set aside.

3. In a large skillet, heat olive oil over medium heat. Add the diced onion and cook until translucent. Stir in garlic and cook for 30 seconds.

4. Add the ground beef and sausage to the skillet, breaking it up with a spoon. Cook until fully browned and no longer pink.

5. Stir in tomato paste, then add crushed tomatoes, Italian seasoning, salt, and pepper. Simmer for 10 minutes.

6. Combine the cooked pasta with the meat sauce. Add half of the mozzarella and a handful of Parmesan. Stir to mix.

7. In a 9×13 inch baking dish, layer half of the pasta mixture, then half of the pepperoni slices. Repeat with remaining pasta and pepperoni.

8. Top with remaining mozzarella, Parmesan, and extra pepperoni if desired.

9. Bake uncovered for 25–30 minutes, until bubbly and golden on top.

10. Let rest for 5 minutes before serving.