Onion Soup Bistro - cooking recipe

Ingredients

6 to 8 large yellow Spanish onions, thinly sliced
6 tbsp. butter
2 tbsp. olive oil
2 tbsp. flour
1 1/2 quarts beef stock*
1 quart chicken stock*
12 to 16 slices Swiss cheese, (square block)
6 to 8 slices Italian or French bread
1 cup dry sherry
Salt and pepper to taste

Preparation

*Granulated beef and chicken bouillon may be substituted.