Why do you buckle a bowl in the pot when cooking sweet potatoes?

The reason for holding the bowl in the pot is to keep the shape of the sweet potato and avoid the shape of the sweet potato from spreading when the heat is too high.

When the sweet potato is cooked, the water originally added to the pot basically evaporates, and there is a soup-like sticky substance under the upside-down bowl. This is because a lot of sugar permeates into the water when soaking sweet potatoes, and some sweet potatoes will leave oil on the pot when they are attached to it. So sweet potato oil is rich in sugar and becomes very sweet.

The practice of sweet potato:

1, wash the sweet potato, and add a proper amount of water to the pot.

2. Put the sweet potato in the pot for 20 minutes, and it can be finished.