Wash the prawns and pat them dry with kitchen paper.
Heat a wok or large frying pan until hot. Add the oil, followed by the ginger and spring onions. Stri fry quickly then add the prawns and stir fry for about 30 seconds.
Add the sauce ingredients and continue to stir fry for another 5 minutes over a high heat. Serve at once accompanied by steamed rice and a stir fried vegetable dish.