Dump and Bake Meatball Casserole

Directions
Preheat the Oven: Preheat your oven to 400°F (200°C). Lightly grease a 9×13 inch baking dish or spray with non-stick cooking spray.
Mix the Sauce: In a large mixing bowl, combine the marinara sauce, water, heavy cream or milk, Italian seasoning, garlic powder, and onion powder. Stir until well combined.
Assemble the Casserole: Spread the uncooked penne pasta evenly in the prepared baking dish. Arrange the frozen meatballs on top of the pasta. Pour the sauce mixture over the meatballs and pasta, making sure everything is well coated.
Bake Covered: Cover the baking dish tightly with aluminum foil. Bake in the preheated oven for 35-40 minutes, or until the pasta is tender and the meatballs are heated through.
Add Cheese: Remove the foil and sprinkle the shredded mozzarella and grated Parmesan cheese over the top. Return to the oven and bake uncovered for an additional 5-10 minutes, or until the cheese is melted and bubbly.
Garnish and Serve: Let the casserole rest for a few minutes before serving. Garnish with fresh basil or parsley, if desired.
Tips and Tricks

Use Fresh Meatballs: If you prefer, you can use homemade or fresh store-bought meatballs instead of frozen ones. Just be sure to brown them in a skillet first.
Cheese Variations: For a different flavor, try using a mix of cheeses such as provolone, fontina, or cheddar.
Add Vegetables: To make this dish even heartier, add some chopped vegetables like bell peppers, onions, or mushrooms to the sauce mixture.
Recipe Variations
Spicy Meatball Casserole: Add some crushed red pepper flakes or use spicy marinara sauce to give the casserole a kick.
Creamy Alfredo Version: Substitute the marinara sauce with Alfredo sauce for a creamy twist on this classic casserole.
Gluten-Free: Use gluten-free pasta and ensure the meatballs are gluten-free to accommodate dietary restrictions.
Storing Leftovers
Store leftover Dump and Bake Meatball Casserole in an airtight container in the refrigerator for up to 3 days. To reheat, place the desired portion in a microwave-safe dish and microwave until heated through, or reheat in a 350°F (175°C) oven until warm.