Heat the oil in a wok or large skillet until it is very hot. Remove the chicken from the marinade with a slotted spoon. Add it to the pan and stir-fry it for 2 minutes until it browns. Remove it and leave to drain in a colander or sieve. Pour off most of the oil, leaving about 2 ts. Reheat the pan over a high heat and add the dried chilies. Stir-fry them for 10 seconds, then return the chicken to the pan. Add the rest of the ingredients and stir-fry for 4 minutes, mixing well. Serve immediately over white rice.