1. Mix the mustard thoroughly with water and put it on the stove to bake, put it in a cage and steam it for a while, and the spiciness will come out.

2. When mixing the mustard, add boiling water and mix well, cover it, and let it sit in a cool place for a few hours to develop the spiciness.

3. After the mustard is washed with boiling water, cool it slightly, use chopsticks to poke a few holes, pour some more boiling water on top until the mustard is submerged, then place it next to the stove, cover it, and leave it for about After 6-8 hours, pour away the boiling water that floats on the surface. This method of preparation will not only make it spicy, but also remove all the bitterness.