Chef Kwok Keung Tung tosses the wok with one hand, using the other to stir with a metal spatula. Both hands occupied, he uses his knee to nudge the gas stove’s lever up and down to control the fire ...

Few cooking styles captivate quite like stir-frying in a wok. Elements like the fragrant smoke, licks of the flame, and constant clangs lend a visceral appeal unique to the style. And even involved ...