1. Bring lightly salted water to boil in large saucepan.
2. Add dry pasta and cook al dente, about 8 minutes (check package directions)
3. Drain pasta.
4. Over medium heat, brown onion and lean ground beef in large skillet.
5. Add spaghetti sauce to skillet and simmer 15 minutes.
6. Preheat oven to 350 F.
7. Butter a 13 x 9-inch baking dish.
8. Layer ½ ziti pasta, Provolone cheese, sour cream, ½ spaghetti sauce mixture, remaining ziti pasta, mozzarella cheese and remaining spaghetti sauce mixture.
9. Top with grated Parmesan cheese.
10. Bake 30 minutes in preheated oven. |