4 lg. onions, thinly sliced
4 tbsp. butter
4 (10 1/2 oz.) cans condensed beef broth
1/2 c. dry sherry
2 tsp. Worcestershire sauce
Dash pepper
6 slices French bread, sliced 1/2" thick & toasted
3/4 c. grated Parmesan cheese
6 slices gruyere or Swiss cheese

In large saucepan or Dutch oven, cook onion until tender (not brown, about 20 minutes). Add beef broth, sherry, Worcestershire sauce and pepper. Bring to a boil. Pour into 6 individual casseroles. Float a slice of French bread in each. Sprinkle generously with Parmesan cheese. Top with gruyere or Swiss cheese.

Bake in 375 degree oven for 15-20 minutes or broil until cheese is bubbly, 15 minutes.