Use hot, mild, or sweet Italian sausage in bulk, but links or patties will also work. You can use penne instead of ziti, and Romano or aged Asiago instead of Parmesan.
Adjust any of the added seasonings and flavorings to suit your own tastes and the characteristics of the brand of sauce you're using.
You can use a 10x15-inch roasting pan instead of a 4-quart baking dish. Don't use a 3-quart baking dish or a 9x13-inch pan as they are not large enough.
For a simpler, quicker version, omit any or all of the following: onion, garlic, baking soda, anchovy paste, Italian Seasoning, fennel seed, black pepper, chili flakes, and black olives. So, if you're happy with your brand of pasta sauce, you can whittle the recipe down to just ziti, sausage, sauce, olive oil, and cheeses!