From: Christina Blessinger
1 lb. uncooked ziti pasta
1 onion, chopped
1 lb. ground beef
2 (26 oz) jars spaghetti sauce
6 oz provolone cheese, sliced
1 ½ c. sour cream
6 oz. mozzarella cheese, shredded
2 Tbsp grated parmesan cheese
Boil ziti pasta in lightly salted water. Cook until tender, about 8 minutes. Drain pasta.
Brown ground beef and onion over medium heat. Drain off fat. Add spaghetti sauce, and simmer 15 minutes.
Preheat oven to 350 degrees. Butter a 9x13 baking dish, and layer ingredients as follows: ½ of the ziti, provolone cheese, sour cream, ½ sauce mixture, remaining ziti, mozzarella cheese and remaining sauce. Top with grated parmesan cheese. Bake for 30 minutes in oven, or until cheese is melted.