Cheesy Italian Potato Casserole
Equipment
- 13 by 9 inch baking dish
- Large frying pan or skillet
- Cutting board and chef’s knife
- Aluminum foil
Ingredients
- 1 pound ground beef
- 3/4 cup diced onions
- 3–4 garlic cloves, minced (optional)
- 3 1/2 cups marinara or pasta sauce, divided*
- 1 teaspoon salt
- 1/4 teaspoon ground black pepper
- 1 teaspoon chili powder
- 1 teaspoon Italian seasoning
- 1 tablespoon minced fresh basil (optional)
- 5 medium potatoes
- 1 cup grated Parmesan cheese
Topping
- Shredded mozzarella cheese (enough to cover)
Instructions
Preheat oven to 375°F (190°C)
- Brown the ground beef in a large frying pan over medium-high heat. When the meat is nearly cooked through, add the diced onions and minced garlic. Cook until the onions are softened and the beef is fully browned.
- Stir in the salt, pepper, chili powder, Italian seasoning, fresh basil (if using), and 2 1/2 cups of the marinara sauce. Reduce heat to low and simmer gently for 20–30 minutes to develop flavor. If the sauce tastes too acidic, add 1–2 tablespoons of brown sugar to balance it. If the mixture becomes too thick because the beef absorbs liquid, add a splash of water or an extra tablespoon of sauce to loosen it.
- While the sauce simmers, peel and cube the potatoes if desired, then slice them thinly lengthwise, similar to scalloped potatoes. Spread the remaining 1/2 cup of marinara sauce in the bottom of a 13 by 9 inch baking dish.
- Arrange the sliced potatoes evenly over the sauce in the baking dish. Sprinkle the grated Parmesan cheese over the potato layer.
- Spoon the meat sauce evenly over the Parmesan-covered potatoes. Cover the dish tightly with aluminum foil and bake in the preheated oven for 50–60 minutes.
- Remove the foil for the last 15 minutes of baking. Top the casserole with shredded mozzarella and continue baking uncovered until the cheese is melted and the potatoes are tender when pierced with a fork. Let the casserole rest a few minutes before serving.
Notes & Tips
Reducing acidity: If your tomato sauce is bright or tangy, stir in 1–2 tablespoons of brown sugar while simmering until you reach the desired balance.
Sauce consistency: If the meat mixture becomes too dry during simmering, add a little water or additional sauce so it spreads easily over the potatoes and keeps them moist while baking.
Make-ahead & freezing: You can assemble this casserole and freeze it (covered) for up to 3 months. Thaw overnight in the refrigerator before baking, or increase baking time slightly if baking from frozen.
Frequently Asked Questions
Can I use pasta instead of potatoes?
Yes. If substituting pasta, cook and drain it well before combining. Because pasta is already tender, reduce the bake time to about 25–30 minutes. Add the shredded mozzarella on top before baking so it melts and browns nicely.
Storage for leftovers:
Store leftovers tightly covered in the refrigerator for up to 5 days. Reheat in the microwave or cover with foil and warm in a 350°F (175°C) oven until heated through. Refrigerated portions also freeze well for up to 3 months.





Keywords
Italian, Potato, Casserole, Cheesy, Saucy, Meal Prep
Equipment needed for this casserole
- 13 x 9 inch baking dish — a glass baking dish makes cleanup easier.
- Large frying pan or skillet to brown the beef and simmer the sauce.
- Cutting board and chef’s knife for slicing potatoes and prepping aromatics.
- Aluminum foil to cover the casserole while it bakes, removing it at the end to brown the cheese.
Ingredients summary: marinara or pasta sauce, potatoes, onions, garlic, ground beef, Parmesan, mozzarella, salt, pepper, chili powder, Italian seasoning, and optional fresh basil.

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