Add wet ingredients, mix and knead for 3-4 minutes.
Form into ball, let triple in volume, about 2 hours.
Punch down dough, roll out, cut out circles (approx. 16).
Brush with oil, fold in half moon shapes.
Lightly roll/press each bao.
Line a steamer tray with parchment. Place bao on paper, cover, and let rise 30 minutes.
Steam for 8-10 minutes, and serve.