Ingredients
5 tablespoons extra-virgin olive oil ,3 tablespoons butter ,1 carrot, finely, diced ,1 medium onion, diced ,1 rib celery, finely diced ,1 clove garlic, sliced ,1 pound veal, ground ,1 pound pork, ground ,1/4 pound pancetta or slab bacon, ground ,1/2 tube tomato paste ,1 cup milk ,1 cup dry white wine ,Kosher salt and freshly ground black pepper ,Parmigiano-Reggiano, for grating
 

tablespoons extra-virgin olive oil tablespoons butter carrot finely diced medium onion diced rib celery finely diced clove garlic sliced pound veal ground pound pork ground pound pancetta or slab bacon ground tube tomato paste cup milk cup dry white wine Kosher salt and freshly ground black pepper Parmigiano-Reggiano for grating

Ingredients: 1 pound dry ziti pasta ,1 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
 

Baked Ziti onion ground beefm spaghetti sauce provolone cheese mozzarella cheese Parmesan cheese