It depends on how big the work is. If it is too big, it can also be cut and steamed. Boiling 15-20 minutes is generally ok. In fact, after steaming for a certain time, you can feel cooked and have no hard heart when you stick it with chopsticks.

The method of steaming sweet potatoes is also very simple, that is, washing and peeling the bought sweet potatoes. Cutting sweet potatoes into chunks is convenient for steaming and saves energy. Put the cut sweet potatoes into a steamer and steam for about half an hour. Finally, put the steamed sweet potatoes on a plate.

Sweet potato (English: sweet potato) was originally named as sweet potato (Ipomoea batatas (L.) Lam. ), also known as red taro, sweet potato, sweet potato, rice, yam (Hebei), sweet potato (North), sweet potato, sweet potato, sweet potato, sweet potato, sweet potato. Sweet potato belongs to the family Convolvulaceae of the genus Panicum, which is more than 2 meters long and lies on the ground. Its leaves are usually wide oval, 4- 13 cm long and 3- 13 cm wide. Corolla pink, white, lavender or purple, bell-shaped or funnel-shaped, 3-4 cm long, and capsule ovoid or oblate. Sweet potato is rich in protein, starch, pectin, cellulose, amino acids, vitamins and various minerals, and has the reputation of "longevity food". The sugar content reached 15%-20%. Has anticancer, heart protecting, emphysema and diabetes preventing, and weight reducing effects. The north is commonly known as sweet potato and sweet potato. Li Shizhen's Compendium of Materia Medica in Ming Dynasty recorded that "sweet potato can tonify deficiency, strengthen spleen and stimulate appetite, and strengthen kidney yin", and said that people in the sea can eat for a long time. Chinese medicine regards sweet potato as a good medicine.