1-First step: get the pasta ready Start by bringing a large pot of salted water to a boil. Cook the pasta until just before al dente, then drain it and rinse it under cold water. This step matters because the pasta will keep cooking in the oven, and you do not want it to turn mushy. Ziti, penne, or rigatoni all work well because they hold onto the sauce and meatballs nicely.

2-Second step: warm the sauce and meatballs While the pasta cooks, pour the marinara sauce into a skillet and simmer it over medium heat. Add the meatballs and let them coat in the sauce for about 5 minutes. If you are using frozen meatballs, thaw them first so they do not water down the sauce. Keep the heat gentle so the meatballs stay intact and soak up flavor.

3-Third step: mix the pasta and sauce Once the sauce and meatballs are ready, add them to the cooked pasta. Stir gently so every piece gets coated without breaking the meatballs apart. If you like a saucier Italian Meatball Pasta Bake, add a little extra marinara at this stage. This is also a good time to taste and adjust the seasoning if needed.

4-Fourth step: build the casserole Transfer the pasta mixture into a casserole dish. Spread it out evenly so the cheese melts across the top in a nice layer. Then add the mozzarella cheese over the entire surface. Fully covering the top helps the bake stay moist and gives you that gooey, cheesy finish everyone loves.

5-Fifth step: bake until bubbly Bake the casserole at 350 degrees Fahrenheit for 30 minutes, or until the cheese is melted and bubbly. If you want a golden top, you can broil it at 450 degrees Fahrenheit for 2 to 3 minutes at the end. Keep a close eye on it during broiling so the cheese does not brown too fast.

6-Final step: finish and serve Take the dish out of the oven and let it sit for a few minutes before serving. Sprinkle chopped fresh basil over the top if you are using it. Serve hot and enjoy the comforting mix of pasta, meatballs, sauce, and cheese.