Ingredients

• 1 pound of ziti
• 1 onion (chopped)
• 1 pound lean ground beef
• 2 X 26 OZ Jars of Spaghetti Sauce
• 6 ounces provolone cheese (sliced)
• 1.5 cups sour cream
• 6 ounces mozzarella (shredded)
• 2 tablespoons grated parmesan cheese

Steps

1. Bring a large pot of lightly salted water to a boil. Add ziti pasta, and cook until al dente, about 8 minutes; drain.
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 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.
4. Bake for 30 minutes in the preheated oven, or until cheeses are melted.