The main component of potatoes is starch, which has the properties of aging and retrogradation. Generally, medium-sized potato pieces can be cooked basically when they are boiled for about 15 minutes. You can stick them with chopsticks, and they will be cooked when they are gently pierced. The stew time is too long and it is not delicious.

Potato tuber contains a lot of starch, which can provide abundant calories for human body, and is rich in protein, amino acids, vitamins and minerals, especially its vitamin content is the most complete among all food crops.

Potatoes are native to the Andes in South America, and now the main producing countries are China, Russian, Indian and American.