1-First step: prep the noodles and oven Preheat your oven to 350°F. Bring a large pot of salted water to a boil, then cook the 12 lasagna noodles until al dente. Drain them well and rinse under cold water so they do not stick together while you build the lasagna. If you are using fresh lasagna sheets, you can skip the boiling step and move straight to assembly.

2-Second step: cook the meat sauce Set a large skillet over medium heat. Add the ground beef, Italian sausage, diced onion, and minced garlic. Cook until the meat is browned and no pink remains, breaking it up as it cooks. Drain off the fat so the finished lasagna does not turn greasy. Next, stir in the pasta sauce, tomato paste, Italian seasoning, salt, and pepper. Let the sauce simmer uncovered for about 5 minutes. This short simmer thickens the sauce and blends the flavors together. Taste it and add more salt if needed. A thick sauce is important because it keeps the lasagna from sliding apart after baking.

3-Third step: mix the cheese layer In a medium bowl, combine the ricotta cheese or cottage cheese, chopped parsley, beaten egg, 1 1/2 cups shredded mozzarella, 1/4 cup shredded Parmesan, and 1/4 teaspoon salt. Stir until everything is evenly mixed. The egg helps the filling hold together, while the parsley adds a fresh note that cuts through the richness.

4-Fourth step: build the lasagna layers Spoon 1 cup of meat sauce into the bottom of a 9×13 baking dish. Spread it out so the noodles will not stick. Add 3 noodles in a single layer, then spread on 1 cup of the cheese mixture and 1 cup of meat sauce. Repeat that layering two more times. Finish with the last 3 noodles, then top them with the remaining meat sauce. The layering pattern is important because it spreads the flavors evenly through the dish. The sauce keeps the noodles tender, and the cheese mixture adds creaminess in every bite. Try to keep the layers even so each slice holds its shape well after baking.

5-Fifth step: bake covered first Cover the dish tightly with foil and bake for 45 minutes. This keeps the lasagna moist while the noodles finish cooking and the flavors mingle. Covering it for most of the baking time also prevents the top from drying out too soon.

6-Sixth step: add the top cheese and finish baking Remove the foil after 45 minutes. Sprinkle the remaining 2 1/2 cups mozzarella and 1/4 cup Parmesan evenly over the top. Return the dish to the oven and bake uncovered for 15 minutes, or until the cheese is bubbly and lightly browned. If you like a deeper golden top, broil it for 2 to 3 minutes, but keep a close eye on it so it does not burn.

7-Final step: rest before serving Let the lasagna rest for at least 15 minutes before cutting. This step matters more than many people think. Resting helps the layers firm up, which makes the slices easier to serve and keeps the filling from spreading across the plate. Use a sharp knife and a wide spatula for clean slices.