RIGATONI WITH MEATBALLS

Name: RIGATONI WITH MEATBALLS
Ingredients: 1/2 cup flat-leaf Italian parsley, chopped; 2 cloves garlic, crushed with the back of a knife and then finely chopped; 1 pound ground beef; 1 pound ground pork or veal; salt and freshly ground black pepper; 1 large egg; 1/2 cup all purpose flour; 1 medium onion, finely chopped; 1 celery stalk, finely chopped; 1 medium carrot, peeled and finely chopped; 2 tbsp olive oil; 1 sprig fresh rosemary; 1 (28 oz) can whole Italian tomatoes, chopped, juices reserved; 14 oz rigatoni pasta; 1/2 cup freshly grated Parmesan cheese