Creating your Pizza Pasta Bake is a simple process that anyone can follow. Just stick to these steps:

1. Preheat Oven: Preheat your oven to 375°F (190°C).
2. Cook Pasta: Boil water in a large pot. Add the penne pasta and cook until al dente, according to package instructions. Drain and set aside.
3. Combine Ingredients: In a large bowl, mix the cooked pasta with marinara sauce, 1 cup of mozzarella cheese, Italian seasoning, salt, and pepper. Stir well to ensure every piece of pasta is coated.
4. Add Toppings: Stir in sliced pepperoni, bell peppers, and cooked Italian sausage (if using).
5. Transfer to Baking Dish: Pour the pasta mixture into a greased 9×13-inch baking dish, spreading it evenly.
6. Add Cheese: Sprinkle the remaining mozzarella cheese and Parmesan cheese on top.
7. Bake: Place in the preheated oven and bake for 25-30 minutes, or until the cheese is bubbly and golden brown.
8. Cool Down: Remove from the oven and allow it to cool for a few minutes before serving.
9. Garnish: If desired, sprinkle with fresh basil for an extra touch of flavor and color.

These straightforward steps will guide you through creating your delicious Pizza Pasta Bake with ease.