You can't. It is suggested to soak the glutinous rice wrapped in zongzi for a while. If it is not soaked, the viscosity of glutinous rice is low, and it is difficult to make zongzi with soft and glutinous taste. Moreover, it takes a long time to cook zongzi, and the ingredients except glutinous rice will be overcooked, losing more nutrients, thus affecting the original flavor of the ingredients. It is suggested that glutinous rice be put into a pot and soaked in warm water for 3 hours. You can pinch the glutinous rice by hand, which proves that the appearance is obviously softened.