This is a great meal for a group. It feeds 8 people. Prep time is minimal.
2 tablespoons grated Parmesan
1 pound dry Ziti pasta
6 ounces mozzarella
1 1/2 cups sour cream
2 jars spaghetti sauce
1 onion chopped
1 pound hamburger
6 ounces Provolone cheese
Bring a large pot of water to a boil. Add Ziti pasta, and cook until tender about 8 minutes. Drain
In a large skillet, brown onion and ground beef over medium heat. Add spaghetti sauce, and simmer 15 minutes.
Preheat oven to 350 degrees. Butter a 9x13 inch baking dish. Layer as follows: 1/2 of the Ziti,Provolone cheese, sour cream, 1/2 sauce mixture, remaining Ziti, mozzarella cheese and remaining sauce mixture. Top with grated Parmesan cheese.
Bake for 30 minutes in the oven or until cheeses are melted.