Ingredients 1 pound dry ziti pasta 1 onion, chopped 1 pound lean ground beef 2 (26 ounce) jars spaghetti sauce 6 ounces provolone cheese, sliced 1 1/2 cups sour cream 6 ounces mozzarella cheese, shredded 2 tablespoons grated Parmesan cheese Step-by-step View Directions 1. Bring a large pot of lightly salted water to a boil. […]