Oyster Sauce - cooking recipe

Ingredients

50 oysters (amount optional)
1 pt. rich milk
6 eggs (hard-boiled)
1/4 lb. butter
1/2 tsp. mustard
1 tsp. lemon juice

Preparation

Make a white sauce with the milk and part of the butter, quite thick.
Cream egg yolks with remainder of butter; add mustard mixed with lemon juice.
Add egg whites, chopped fine.
Mix with white sauce.
Cook oysters separately just until the edges curl.
Mix all together.
Season to taste.
Stir a lot, it can stick.