Cut the sweet potato into small pieces and put it in cold water in the pot. There is about one to two inches more water than sweet potatoes. The fire is boiling. Turn it to medium heat and slowly suffocate until the water is dry. Wait until you can see that the sweet potato in the pot is running out of water.

Then you can put a sweet potato with chopsticks and try to see if there is a white star in it. If there is, it is hard inside. You can continue to add some cold water or hot water (add water around the pot, don't pour it directly).

Sweet potato is the only potato food containing vitamin C in starch staple food, and its β -carotene content is also the richest nutrient in potatoes and starch. β -carotene is a good antioxidant, and its different content makes sweet potatoes show different colors. The more beta-carotene, the darker the color of sweet potato. Different colors of sweet potato have different antioxidant capacity. Generally speaking, the darker the color, the stronger the antioxidant capacity.

Extended data:

The practice of sweet potato

Sweet potatoes must be steamed before eating, because the starch particles in sweet potatoes are not destroyed by high temperature and are difficult to digest.

Sweet potato contains an oxidase, which easily produces a large amount of carbon dioxide gas in human gastrointestinal tract. Eating too much sweet potato will make people bloat, burp and fart. Sweet potato has a high sugar content. Eating too much will stimulate gastric acid secretion and make people feel heartbroken. Because the stomach is stimulated by excessive gastric acid, the contraction is strengthened, and the gastric acid can flow back to the feeding tube, causing acid and water vomiting. When eating sweet potatoes, it is best to match a little pickles, which can effectively inhibit stomach acid.

References:

People's Network+Sweet Potato can relieve constipation and resist aging. Sweet potatoes must be steamed before eating.