1. Rinse the yam with the skin into the pressure cooker and press the water tightly. After the air is applied, press the medium heat for 15 minutes to turn off the heat, and let it out naturally.
2. Take out the yam, peel it, and pound the peeled yam directly into a fine yam mud with a spoon
3. Add an appropriate amount of sugar and stir evenly, shape with a mold, and then pour canned blueberries on it.
