Firstly, clean the sheep brain, rinse it with clear water, remove blood tendons from the sheep brain, slice ginger for later use, and shell longan directly; Then boil the water in the pot and put the ginger in. After the water is boiled, put it into the sheep brain, blanch it in the water and remove the blood color. Finally, put the sheep brain into the pot, add longan, add a little ginger, and pour water to start stewing the sheep brain. It will take about 40 minutes. When the sheep's brains are ripe, sprinkle with medlar. Don't put the medlar in advance, or it will be sour. This is the way to stew sheep brain.