Ground Beef Dinner — Bolognese Sauce

Name: Ground Beef Dinner — Bolognese Sauce
Ingredients: 1 large onion; 3 medium carrots; 3 stalks celery; 3 cloves garlic; 3 1/2 pound ground beef, veal and pork mix, browned and drained; 3 large cans diced tomatoes; 1 large can tomato purée; 2 cup red wine; 2 tablespoon salt; 1 pound chicken livers; 3 tablespoon butter; 2 tablespoon sherry