•  1 pound dry ziti pasta1 onion, chopped
• 1 pound lean ground beef
• 2 (26 ounce) jars spaghetti sauce
• 6 ounces provolone cheese, sliced
• 1 1/2 cups sour cream
• 6 ounces mozzarella cheese, shredded
• 2 tablespoons grated Parmesan cheese

1. Bring a large pot of salted water to a boil and add ziti.  Cook about 8 minutes until tender to the bite or ‘al dente’.

2. In a large skillet, brown onion and ground beef over medium heat. Add spaghetti sauce, and simmer 15 minutes.

 3. Preheat the oven to 350 degrees F (175 degrees C). Butter a 9×13 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.

 4. Bake for 30 minutes in the preheated oven, or until cheeses are melted.