EASY ONION SOUP

1Large Onion (4cups)Thinly Sliced
1/4 Cup Butter,Cubed
2 Cans(14 1/2oz)Beef Broth
2 Tablespoons Sherry or Additional Beef Broth
1/2 Tablespoon Pepper
4 Slices French Bread 1/2 Inch Thick, Toasted
4 Slices Provolone Cheese

Place onion and butter in a sprayed crockpot. cover and cook on low for 4 hours or until tender.Stir in broth, sherry and pepper. Let cook for 2 hours longer. Ladde soup into ovenproof bowls and top with a slice of toast and cheese.Broil in oven for 2 to 3 minutes until cheese is melted.