HEAT a frying pan or wok, add a little oil, and cook steak and garlic in small amounts until meat is just browned.
ADD sugar peas, spring onions and combined ingredients (Vegemite*, sugar, sherry, water and plum sauce). Stir fry for 4 - 5 minutes or until vegetables are tender. Add silverbeet, tossing gently until just cooked.
SERVE immediately with rice or noodles.