Hardboil eggs, then cool under running water and shell. Slice onion.
Place pork in a pan with water and bring to a boil. Cook, uncovered, 2 minutes, then drain, discarding liquid.
Heat oil in a large heavy pan. Add onion and stir-fry until translucent. Add pork and brown quickly on all sides.
Stir in and quickly heat soy sauce, sugar and sherry; then simmer, covered, 30 minutes, turning meat once or twice.
Add eggs and simmer 3O minutes more, turning meat and eggs once or twice for even cooking and coloring.Servings: