Baked Ziti - Chefwiz.com

Ingredients

• 1 lb of dry ziti pasta
• 1 medium-sized onion (, chopped)
• 1 lb of lean ground beef
• 2 jars (26 oz each) of spaghetti sauce
• 6 oz of sliced provolone cheese
• 1 ½ cups of sour cream
• 6 oz of shredded mozzarella cheese
• 2 tbsp of grated Parmesan cheese