Bring a large pot of salted water (at least 2 quarts of water with 1 tablespoon salt) to a strong boil. Add the 1 pound ziti pasta and cook until al dente (cooked but firm - it will continue cooking in the oven). When done, drain the pasta and set aside.
Make the meat sauce:
Meanwhile, while the pasta is cooking, brown the 1 pound Italian sausage in a large sauté pan on medium-high heat.
Once the meat is starting to brown, add 1 large yellow onion and sauté until soft, about 5 minutes. The onions should absorb any excess oil in the pan. Add 4 cloves garlic and 1 tablespoon Italian seasoning, stir to combine and cook for a few more minutes.
Add sauce and bring to a simmer.
Bake the Baked Ziti casserole:
Spread a thin layer of the meat sauce in the bottom of a 9x13-inch casserole pan.
Combine a large spoonful of the 28 ounces marinara sauce with the cooked ziti and add the pasta to the casserole dish.
Spoon about half of the 2 cups ricotta cheese onto the pasta and spread to create an even layer.
Spread the remaining meat sauce onto the pasta.
Top with remaining ricotta cheese and 1 tablespoon fresh basil.
Add the remaining pasta. Pour the remaining sauce over the pasta and cover casserole with the 8 ounces mozzarella cheese and 1 cup parmesan cheese.
Bake in oven at 350°F, covered with foil or an oven safe lid, for about 20 minutes. Remove the lid and continue cooking until the top is lightly browned and the cheese melted.
Notes
I highly recommend using the highest quality ingredients. Whole milk ricotta and mozzarella taste the best. Real Italian parmesan that you grate yourself will give you the best results. Be sure to use your favorite marinara sauce too.
Make ahead directions: You can make this recipe all the way up to the point where the Baked Ziti is put into the oven. Instead, you can cover and refrigerate or freeze until ready to eat. If you freeze, be sure to thaw to room temperature before baking.
Storage: Keep leftover Baked Ziti in an air tight container in the refrigerator. Best if eaten within a few days.
Reheating: You can reheat in the microwave on 50% power until heated through or you can reheat in the oven, covered, until the cheese is melted.