Onion Soup - cooking recipe

Ingredients

1/2 c. butter
1 1/2 Tbsp. flour
1 Tbsp. Dijon or other dark mustard
10 c. beef broth or 10 bouillon cubes plus 10 c. water
4 large onions
salt and pepper to taste
Swiss cheese
bread slices

Preparation

Slice onions and saute until light brown; add flour, mustard and seasonings.
Carefully add water or broth.
Simmer for at least 1 1/2 to 2 hours or more.
To serve, place soup in bowls; add slices of bread and cheese.
Microwave each serving until cheese melts.