Thin yam can be cooked in about 3 to 5 minutes after boiling, while thick yam needs to be cooked in about 8 to 10 minutes. For yam segments, it can be cooked in about 15 minutes. Generally, when cooking yam, the vegetable yam becomes transparent, and the iron yam becomes soft and ripe.

Boiled yam can be peeled or peeled. Yam skin and its main components are the same as yam, so yam skin is also a kind of nutritious food, and yam skin can lock all the nutrients in yam to a certain extent to prevent it from flowing out with water, so people who don't mind can cook it together with yam skin, and peel it when eating.

Extended data:

Yam has the effects of nourishing and strengthening, helping digestion, astringing deficient sweating and stopping diarrhea, and is mainly used for treating chronic enteritis such as diarrhea due to spleen deficiency, cough due to lung deficiency, diabetes, short urination, nocturnal emission, women's leukorrhagia and dyspepsia. Yam is most suitable to be taken with Ganoderma lucidum, which has the function of preventing and treating diabetes. Yam has great development prospects in food industry and processing industry.

References:

Baidu encyclopedia-yam