Creating Dump-and-Bake Meatball Casserole is a breeze when you follow these simple steps:

1. Preheat the Oven: Set your oven to 375°F (190°C).
2. Prepare the Baking Dish: Lightly grease a 9×13-inch baking dish with cooking spray or olive oil.
3. Combine Ingredients: In the baking dish, combine the frozen meatballs, marinara sauce, and uncooked pasta. Stir well to distribute the ingredients evenly.
4. Add Seasoning: Sprinkle the Italian seasoning and season with salt and pepper according to your taste preferences.
5. Pour Water: Pour in 3 cups of water and mix everything together again.
6. Top with Cheese: Sprinkle the shredded mozzarella cheese evenly over the top of the mixture. Finish by sprinkling the grated Parmesan cheese.
7. Bake: Cover the dish with aluminum foil and bake for 20 minutes. Then, remove the foil and bake for an additional 10-15 minutes, or until the cheese is bubbly and golden brown.
8. Garnish: Once out of the oven, let it cool slightly before garnishing with fresh basil or parsley.

By following these straightforward steps, you’ll achieve a delicious and cheesy meatball casserole that is both fulfilling and enjoyable.