Baked Ziti

Baked Ziti Cori's recipe

1 lb dry ziti pasta (or penne)
1 onion, chopped
2 26 oz jars spaghetti sauce
6 oz provolone cheese, sliced
1 1/2 c sour cream
6 oz mozzarella cheese, shredded
2 T grated Parmesan cheese
1 lb ground beef (I keep pre-cooked in freezer)

1. Cook pasta al dente & drain.
2. In a large skillet, brown onion and beef together. Drain. Add spaghetti sauce and simmer 15 minutes.
3. Preheat oven to 350. Butter a 9 1/2 x 13 1/2 baking dish. Layer as follows: 1/2 ziti, provolone cheese, sour cream, 1/2 sauce mixture, remaining ziti, mozzarella cheese, and remaining sauce mixture. Top with grated parmesan cheese.
4. Bake for 30 minutes in preheated oven, or until cheeses are melted.