Baked Ziti

1 lb dried ziti
1 lb ground beef
1 T dried onion
1 jar Traditional Prego
1 jar Sausage Prego
6 oz. spliced provolone cheese
1 1/2 cups sour cream
8 oz mozzarella cheese
2 T grated parmesan cheese

Cook Ziti al dente. Brown meat with dried onion. Add sauce and simmer for 15 minutes. Layer half of Ziti in sprayed baking dish. Layer provolone cheese on pasta. Spread sour cream over provolone. Spread half of sauce. Add remaining Ziti. Add mozzarella and remaining sauce. Top with parmesan cheese. Bake for 30 minutes at 350.