BAKED ZITI

BAKED ZITI

1 lb dry ziti pasta
1 onion, diced
1 lb lean ground beef
2 (26 oz) jars spaghetti sauce
6 oz provolone cheese, sliced
1 1/2 C sour cream
6 oz mozzarella cheese, shredded
2T grated Parmesan cheese

Bring a large pot of water to a boil.  Add ziti pasta, and cook until al dente, about 8 minutes; drain.
In a large skillet, brown onion and ground beef over medium heat.  Add spaghetti sauce, adn simmer 15 minutes.
Preheat oven to 350 degrees.  Butter a 9x13" baking dish.  Layer as follows:  1/2 of ziti, provolone cheese, sour cream, 1/2 sauce mixture, remainig ziti, mazzarella cheese adn remaining sauce mixture.  Top with grated Paremsan cheese.
Bake for 30 minutes in the pre-heated oven, or until cheeses are melted.