Russian Stewed Duck.

Chop a cabbage with 1 large onion and 2 stalks of celery and 2
peppers; season well with salt and sprinkle with pepper. Heat some
vinegar; add a teaspoonful of prepared mustard. Then beat the yolks of
2 eggs with a tablespoonful of sugar; add the hot vinegar slowly to
the beaten eggs and mix with the cabbage. Serve cold.