Soak the kidney slices in clean water for a while to remove the gamey smell before they go into the wok.
Tips
usage
腰 here is the kidney, as in 腰子. The cook scores the kidney in a criss-cross pattern so the pieces curl up like flowers in the hot wok, hence 花. The classic way to cook it is a fast, fierce stir-fry, 爆炒.
