First, ingredients: 4 sweet potatoes and 200 grams of water.

Second, the steps:

1. Choose sweet potatoes with even heads and similar sizes.

2. Rinse repeatedly with clear water to wash off the sediment.

3. Cut off the spotted part of the epidermis with a knife.

4. Add half a centimeter of water to the pressure cooker, because the pressure cooker seldom loses water during cooking.

5. Add the sweet potato, cover it and choose it for 20 to 25 minutes according to the size of the sweet potato.

6, electricity heating, until the completion. You can enjoy delicious sweet potatoes.

Sweet potato tuber contains 60%-80% water, 10%-30% starch, about 5% sugar and a small amount of protein, oil, cellulose, hemicellulose, pectin and ash. If 2.5Kg fresh sweet potato is converted into 0.5Kg grain, its nutritional components are higher than rice and flour except fat.

Reference source Baidu Encyclopedia Sweet Potato