03
In a separate bowl, combine the hot pepper flakes, soy sauce, sugar and chicken stock. Set aside.
04Heat the peanut or vegetable oil in a large wok or skillet and add the crabs. Stir fry for about three minutes over medium heat. Add the black-bean mixture and continue stir-frying for about one minute.05Add the soy-sauce mixture, stir and bring to boil. Cover the pan and cook for two minutes. Then add the cornstarch mixture and stir until the sauce thickens and becomes glossy. Correct seasoning (you may wish to add more soy sauce or pepper) and add the sesame oil. Remove from heat and place on heated plates. Sprinkle with coriander and serve.