Prepare the baking dish: In a 9x13 inch baking dish, combine the uncooked penne pasta, marinara sauce, water, and Italian seasoning. Stir until the pasta is fully coated in the sauce.
Add the meatballs: Place the frozen meatballs evenly over the top of the pasta mixture.
Cover and bake: Cover the baking dish tightly with aluminum foil and bake in the preheated oven for 35 minutes.
Add the cheese: After 35 minutes, remove the foil and sprinkle the mozzarella and Parmesan cheeses evenly over the top of the casserole.
Bake uncovered: Return the dish to the oven and bake, uncovered, for an additional 10-15 minutes, or until the cheese is melted and bubbly, and the pasta is tender.
Garnish and serve: Remove the casserole from the oven and let it cool slightly. Garnish with fresh basil or parsley, if desired, before serving.
Prep Time:
10 minutes
Cook Time:
45-50 minutes
Total Time:
55-60 minutes
Nutrition (per serving):
Calories: 420
Carbohydrates: 45g
Protein: 24g
Fat: 17g
Saturated Fat: 8g
Cholesterol: 55mg
Sodium: 980mg
Sugar: 8g
Fiber: 4g