Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   1      pound         fish fillets
   1      bottle        beer
     1/2  cup           water
   1      small         onion -- quartered
   1      small         celery stalk -- cut in
   2      tablespoons   minced parsley
   1      teaspoon      salt -- dash of white
                        -- pepper
   2                    egg yolks
   2      tablespoons   cream
   2      tablespoons   butter

Preparation:

Put beer, onion, celery, parsley, salt and pepper in a skillet. Heat to boiling and add fish. Cover and simmer about 8-10 minutes, or just until fish flakes with a fork. Drain fish and put onto deep platter. Place in a 300F oven to keep warm. Boil cooking liquid about 5 minutes to reduce and strain. In the top of a double boiler, beat egg yolks with cream. Gradually stir in 1/2 cup hot strained cooking liquid. Cook over boiling water, stirring constantly, until thickened. Cut butter into small pieces and stir into sauce, one piece at a time. Pour sauce over fish.