Italian Ground Beef Pasta Bake with Tomato and Mozzarella

This Italian-American-style pasta bake combines browned ground beef, tomato sauce, tender rigatoni, and a golden mozzarella topping in one comforting casserole. It borrows the practical spirit of baked pasta dishes, which vary widely by region and household, and works well because the pasta finishes cooking in the oven while it absorbs the savory sauce.

Ingredients

12 oz (340 g) rigatoni or penne
4 qt (3.8 L) water, for boiling the pasta
2 tsp (12 g) fine salt, for the pasta water
1 tbsp (15 ml) olive oil
1 lb (454 g) ground beef, preferably 85% lean
1 medium yellow onion, finely diced, about 1 cup (150 g)
3 garlic cloves, minced, about 1 tbsp (9 g)
2 tbsp (32 g) tomato paste
1 can crushed tomatoes, 28 oz (794 g)
½ cup (120 ml) low-sodium beef broth or water
2 tsp (4 g) dried Italian seasoning
1 tsp (6 g) fine salt, for the sauce, plus more to taste
½ tsp (1 g) freshly ground black pepper
¼ tsp (0.5 g) red pepper flakes, optional
2 cups (200 g) shredded low-moisture mozzarella
½ cup (50 g) finely grated Parmesan
2 tbsp (8 g) chopped fresh parsley, optional

Instructions

Get set up. Heat the oven to 400°F (200°C). Lightly oil a 9-by-13-inch (23-by-33-cm) baking dish. Dice the onion, mince the garlic, and measure the sauce ingredients so they are ready beside the stove. If the oven takes a while to heat, start preheating while you chop.
Brown the beef. Warm the olive oil in a large, deep skillet or Dutch oven over medium-high heat. Add the ground beef and onion. Cook for about 8 minutes, breaking the beef into small pieces with a wooden spoon and stirring often, until the onion softens and the beef is browned. Check the thickest pieces with a food thermometer: USDA FSIS lists 160°F (71°C) as the safe minimum internal temperature for ground beef. If there is a large amount of rendered fat, spoon off most of it, leaving a little in the pan for flavor.
Build the tomato sauce. Stir in the garlic and tomato paste and cook for 1 minute, stirring so the garlic does not scorch. Add the crushed tomatoes, broth, Italian seasoning, 1 teaspoon salt, black pepper, and red pepper flakes if using. Scrape the browned bits from the bottom of the pan into the sauce. Bring it to a gentle simmer, then cook uncovered for 15 minutes, stirring occasionally. The sauce should thicken slightly but remain loose enough to coat pasta; if it becomes too thick, stir in a splash of water.
Boil the pasta while the sauce simmers. Bring the measured water to a boil in a large pot, add the 2 teaspoons salt, and cook the rigatoni for 2 minutes less than the package’s al dente time. For example, if the package gives a 10-minute al dente time, boil for 8 minutes. The pasta will finish in the oven, so avoid cooking it fully soft now. Drain well; do not rinse, because the starch on the pasta helps the sauce cling.
Combine and assemble. Stir the drained pasta into the beef sauce until each piece is coated. Taste a piece with a little sauce and adjust the salt or pepper if needed. Transfer the mixture to the prepared dish and spread it evenly. Sprinkle the mozzarella over the top, then distribute the Parmesan over the mozzarella for a savory, lightly browned finish.
Bake and rest. Bake uncovered for 20 minutes, until the edges bubble and the cheese has melted with a few golden spots. If you want more color, use the broiler for 1 to 2 minutes at the end, watching closely so the cheese does not burn. Let the casserole rest for 5 minutes before serving; this short pause helps the sauce settle and makes portions easier to lift.

Tips

Choose a pasta shape with ridges or openings. Rigatoni, penne, and ziti hold the meat sauce well. Smaller shapes such as rotini also work, but check the package early because different shapes have different cooking times.
Keep the pasta slightly firm before baking. Boiling it 2 minutes short of the package’s al dente time leaves room for oven cooking. Fully softened pasta can turn mushy after it sits in hot sauce and bakes.
Use lean beef without drying the dish out. 85% lean ground beef gives the sauce flavor without leaving excessive grease. With fattier beef, drain more of the rendered fat; with very lean beef, keep the tablespoon of oil and add a splash of broth if the pan looks dry.
Season in stages and use a thermometer. Salt levels vary among canned tomatoes, broth, and cheese, so taste the sauce before mixing. Wash hands and utensils that touched raw beef, and use a clean thermometer to check the beef rather than judging doneness by color alone.

Serving Suggestions

Serve the pasta bake hot, giving each portion a little of the browned cheese from the edges of the dish. A simple green salad with a sharp vinaigrette balances the rich tomato and cheese, while steamed green beans, roasted broccoli, or sautéed zucchini make an easy vegetable side. Garlic bread or a sliced loaf is useful for catching any sauce left on the plate; if serving bread, keep it modest so the meal remains centered on the casserole.

For a family-style meal, put the baking dish on a trivet and bring a serving spoon to the table. Add parsley just before serving for a fresh, mild herbal note. Extra Parmesan can be offered separately, allowing everyone to add as much as they like without making the casserole saltier for the whole table.

Variations

Make it spicier. Increase the red pepper flakes to ½ teaspoon, or serve chili flakes at the table so each person can adjust their portion. A spoonful of chopped pepperoncini stirred into the sauce adds tang as well as heat.
Use Italian sausage. Replace some or all of the beef with ground Italian sausage for a more heavily seasoned, often saltier casserole. Brown it in the same way and check that ground meat reaches 160°F (71°C); taste before adding the sauce salt, since sausage can contribute plenty.
Add vegetables. Stir 1 cup (about 150 g) diced bell pepper into the skillet with the onion, or fold in 2 cups (about 60 g) baby spinach when the sauce is finished simmering. Cook watery vegetables such as mushrooms until their released liquid has mostly evaporated so the bake does not become thin.
Change the cheese or pasta. Use provolone in place of some mozzarella for a sharper, more savory top, or use a gluten-free pasta and follow its package directions, stopping it short of fully tender. Gluten-free shapes can soften more quickly in the oven, so check the bake near the end rather than adding extra baking time automatically.

Storage and Reheating

Let leftovers cool briefly, then refrigerate them within 2 hours of cooking in a covered container or in the baking dish tightly covered with a lid or foil. Keep the casserole refrigerated at 40°F (4°C) or colder and use it within 3 to 4 days. For easier lunches, divide it into individual portions before chilling; shallow containers help the food cool more evenly.

Reheat a single portion in the microwave, covered loosely, stirring or turning it halfway through if possible. For a larger amount, cover the dish with foil and warm it in a 350°F (175°C) oven until hot throughout. Add a tablespoon or two of water or broth before reheating if the pasta looks dry. USDA FSIS recommends reheating leftovers to 165°F (74°C); check the center with a food thermometer. You may freeze portions in airtight freezer-safe containers for about 2 to 3 months for best quality. Thaw overnight in the refrigerator before reheating, and do not leave cooked pasta at room temperature for extended storage.

Frequently Asked Questions

Can I make this pasta bake ahead?
Yes. Make the sauce and boil the pasta 2 minutes short of al dente, combine them, and refrigerate the assembled mixture covered for up to 24 hours. For the best texture, add the cheese just before baking. Since a cold dish takes longer to heat, allow extra oven time and check that the center is hot; do not put a very cold glass dish into a hot oven unless its manufacturer says it is safe.

Should I cover the casserole while it bakes?
No, not for the standard 20-minute bake. Baking uncovered lets moisture escape and gives the cheese a chance to brown. If the cheese is getting dark before the edges bubble, loosely cover the dish with foil for the remaining time.

Can I use a different tomato product?
Crushed tomatoes give the sauce a thick, slightly textured consistency. If using diced tomatoes, crush some with a spoon or briefly chop them so the sauce coats the pasta more evenly. Tomato passata works too, but it is smoother and can be thinner; simmer it until it thickens slightly before combining it with the pasta.

Why is my pasta bake watery?
The most common causes are pasta that was not drained well, vegetables that released excess liquid, or a sauce that was too thin before assembly. Let the sauce simmer until it lightly coats a spoon, drain the pasta thoroughly, and cook mushrooms or other watery vegetables before adding them. A short rest after baking also helps the sauce settle.

Can I assemble it in a different-sized dish?
A dish close to 9 by 13 inches gives the mixture enough room to heat evenly and keeps the cheese layer from becoming too thick. A smaller, deeper dish may need extra baking time, while a larger shallow dish can cook faster and brown more quickly. Watch for bubbling edges and a hot center rather than relying only on the clock.

What can I use instead of beef broth?
Use water for a straightforward substitute; the sauce will be a little less savory but still gets plenty of flavor from the beef, tomato paste, and Parmesan. Low-sodium chicken broth also works, though it changes the flavor slightly. If your broth is salted, taste the sauce before adding the full teaspoon of salt.

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Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes

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