Italian Sausage Bake
A cozy, five-ingredient casserole layering al dente pasta, marinara, chunks of Italian sausage, and melted mozzarella and Parmesan. It comes together fast and bakes into a bubbling, family-friendly dinner.
- 16 oz rotini pasta (or penne pasta)
- 24 oz spaghetti sauce (your favorite brand)
- 1 lb Italian sausage (Italian sausage links - sweet, mild, or spicy)
- 1 cup mozzarella cheese (grated)
- ¼ cup Parmesan cheese (optional - shredded or grated)
- 1 tablespoon basil (optional - fresh, chopped)
- Start by heating your oven to 375°F (190°C) so it has plenty of time to come fully up to temperature before the casserole goes in. While it heats, rub a light coating of olive oil across the bottom and sides of a 2.5-quart casserole dish or a 9x13-inch baking pan, which keeps the pasta from sticking once the sauce and cheese are layered on.
- Bring a large pot of salted water to a boil and cook your rotini (penne, rigatoni, or ziti all work) according to the package directions, but pull it about two minutes short of the suggested time so it stays slightly firm. Since the pasta will keep cooking in the oven, drain it right away and rinse briefly under cool water to stop the cooking process and keep it from turning soft before it even bakes.
- Spread the drained pasta in an even layer across the bottom of your prepared dish, nudging it into the corners so every portion ends up with its fair share of sauce and cheese.
- Ladle the spaghetti sauce over the pasta and spread it out with the back of a spoon so it reaches every edge of the dish. This layer is what keeps the noodles moist and flavorful while everything finishes cooking in the oven.
- Cut the Italian sausage links into bite-sized chunks and nestle them into the sauce, pressing gently so they sit partially submerged. Distributing the pieces evenly means every serving gets its share of sausage, and pressing them in helps them cook through fully during baking.
- Grate the mozzarella, and the Parmesan if you're using it, and scatter both evenly over the sausage layer, making sure to reach all the way to the edges so no corner is left bare.
- Scatter the fresh basil over the top if using, then slide the dish into the oven and bake for 35 to 40 minutes. It's ready when the sauce is bubbling actively around the edges, the cheese has turned deep golden in spots, and the sausage reads at least 160°F (71°C) on an instant-read thermometer.
- Pull the casserole from the oven and let it rest for a couple of minutes so the sauce settles before you serve it. Finish with an extra sprinkle of cheese, basil, or chopped parsley if you like, then serve it hot and bubbling straight from the dish.
Chef's Note: This casserole proves that a short ingredient list can still deliver a genuinely satisfying dinner. Layering the pasta, sauce, and sausage instead of stirring everything together lets each element hold onto its own texture — the sausage stays juicy, the sauce clings to the noodles, and the cheese forms a proper golden crust on top rather than disappearing into the mix.
For an even easier weeknight version, assemble the whole casserole up to a day ahead, cover, and refrigerate — just tack on an extra 10 minutes or so of bake time since it'll be going into the oven cold. Leftovers reheat well covered in a low oven, and if you only have ground Italian sausage on hand instead of links, it works just as well pressed into the sauce layer in small clusters.
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