Preheat oven to 350 degrees F. Coat a 9- x 13-inch baking dish or 3-quart casserole with cooking spray.
In a large pot of boiling, salted water, cook ziti until just barely tender; drain and place in a large bowl.
Add ricotta cheese, 1-1/2 cups mozzarella cheese, garlic, salt, and parsley to the ziti; mix well. Spread half the spaghetti sauce over bottom of prepared baking dish. Spoon ziti mixture into baking dish; cover with remaining spaghetti sauce, then sprinkle with Parmesan cheese.
Bake 25 minutes, then top with remaining mozzarella cheese and bake 10 additional minutes, or until heated through.
Use your favorite type of flavored spaghetti sauce to add additional flavor to this ziti. And don’t worry if you don’t have ziti on hand — just substitute any other equal-sized shape.