4 slice(s) thick bread, like French bread or hoagie rolls toasted and broken into large pieces
1/4 cup(s) Mozzarella cheese shredded
Place margarine or butter, onions, broth, Worcestershire, and salt in slow cooker. Cover and cook on LOW 8 - 10 hours or on HIGH 4 - 6 hours. Serve hot in bowls, sprinkle with cheese and top with pieces of bread.