Follow these simple steps to prepare delicious Dump and Bake Meatball Casserole:

1. Preheat the oven to 375°F (190°C).
2. In a large baking dish, add the frozen meatballs.
3. Pour marinara sauce over the meatballs, ensuring they are well-coated.
4. Add the cooked pasta to the dish, mixing it lightly with the meatballs and sauce.
5. Sprinkle Italian seasoning, salt, and pepper over the mixture. Mix again to distribute evenly.
6. Top with shredded mozzarella cheese and grated Parmesan cheese.
7. Cover the baking dish with aluminum foil and bake in the preheated oven for 25 minutes.
8. Remove the foil and bake for an additional 10-15 minutes or until the cheese is bubbly and golden.
9. Once baked, take it out from the oven and let it cool for a few minutes.
10. Garnish with fresh basil or parsley if desired, and serve hot.

With these straightforward instructions, you’ll have this delightful casserole ready in no time, making dinner prep a breeze.