Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   3      tablespoons   butter
     1/2  cup           mushrooms -- coarsely chopped
   1      pinch         cayenne pepper
   1      teaspoon      flour
     1/4  cup           chicken broth
   4                    eggs -- room temperature
     1/2  teaspoon      salt

Preparation:

In small skillet, heat 1 tablespoon butter. Add mushrooms and cook for 2 minutes over high flame, stirring constantly. Add 1/4 teaspoon salt and cayenne pepper. Sprinkle with flour and cook until slightly browned. Add chicken broth. Lower flame and simmer for 5 minutes. Butter 4 custard cups with remaining butter. Place 1 tablespoon mushrooms at bottom of each cup. Break 1 egg in each cup over mushrooms. Salt. Place cups in pan containing hot water. Bake at 400F for approximately 10 minutes, or until white is well set. Serve hot. (If eggs are taken from refrigerator just before cooking, baking time is about 5 minutes longer.) Recipe Source: THE ART OF FRENCH COOKING by Fernande Garvin