4 lg. onions, thinly sliced
1/4 c. butter
3 (10 1/2 oz.) cans condensed beef broth or 4 c. bouillon
1 tsp. Worcestershire sauce
1/2 tsp. salt
Dash pepper
Hard rolls
Mozzarella cheese

Cook onions in butter until lightly browned, about 20 minutes. Add broth and Worcestershire; bring to a boil. Season with salt and pepper.

Pour soup into oven proof bowls or crocks. Float chunks of hard rolls or crusty bread. Cover with cheese. Place under broiler briefly to melt cheese.