Cut water chestnuts into fine dices. Drain well and combine with minced pork, minced ginger and seasonings. Using a pair of chopsticks, mix into an elastic paste. Shape into 3-4 pork balls. Deep fry in oil, drain well.
Wash and cut vegetables. Heat some oil in wok, and saute vegetables until soft. Add in ingredients for sauce , as well as the fried pork balls. Using high heat, cook until sauce boils again, the turn to low heat and let simmer until all ingredients are soft.