Cook the pasta. Bring a large pot of salted water to a boil and stir in the dry pasta. Cook until al dente according to the package.
Drain the pasta. Save 1/2 cup of pasta water, then drain the pasta once it's cooked.
Mix the pasta with some sauce and cheese. Add the pasta back to the pot, add half of the mozzarella, and half of the parmigiano with 3 cups of sauce and 1/2 cup of pasta water. Fold everything together, being gentle to not break the pasta as you mix everything together.
Add to a baking dish. In a 9x13 baking dish, add the pasta, then top with the remaining sauce and cheese.
Bake. Cover the dish tightly with foil and bake for 25 minutes covered then remove the foil and bake the remaining 10 minutes uncovered. If you'd like to brown the cheese, you can broil the top on high for 30 seconds. Then remove from the oven and serve!
Video
Notes
The prep time in the recipe card does not reflect the time it takes to make the meat sauce, which would need 4 hours to cook before making baked ziti.