Boil peas in salted water until tender. Drain and reserve the boiled water. Press peas through a sieve and discard the skins. Brown onions in butter. Put the boiled water you reserved in a saucepan. Add the peas, onion, butter and sliced potatoes. Season with salt and pepper to taste. Bring to a boil and simmer, covered, for 35 minutes, or until potatoes have disintegrated. Stir in the well beaten egg yolk just before serving.
Gumbos, Soups, Chowders
Cajun Country -- New Iberia, Louisiana