Heat sauce (I).
Cut fresh beancurd sheets into rectangular pieces, and soak in sauce(I) for a few minutes, then steam over hot water for 5 minutes. Let cool.
Heat oil in wok, shallpw fry beancurd sheets. Drain away excess oil, then arrange on serving plate.
Wash and trim vegetables,and boil in sauce(I) until soft and arrange on plates.
Bring stock to the boil, stir in sauce (II), then pour over beancurd sheets and vegetables.