(1) Appropriate amount of celery, sweet potato, ginger, garlic and cooking oil should be prepared.

(2) Cut off the skin of the sweet potato and cut it into small pieces for later use. Celery is washed with clear water to appreciate the remaining rhizome, and then cut into blocks with a knife.

(3) Heat oil from a pan, add appropriate amount of ginger slices and garlic, stir-fry with medium heat and stir-fry until fragrant.

(4) Boil the water from the pot, put the prepared sweet potato in the pot, cover the pot, and cook with medium heat.

(5) When the sweet potato is soft, you can add celery, and the time can be determined according to the size of celery.

(6) Add salt to taste before cooking.

2. Practice 2

(1) Prepare appropriate amount of sweet potato, ginger, white sugar powder and brown sugar.

(2) Peel the sweet potato, clean it with clear water and cut it into small pieces with a knife for later use.

(3) Pour a proper amount of water into the pot and add a proper amount of ginger slices for boiling. Remember to use small fire!

(4) Put an appropriate amount of brown sugar and water in another pot, and cook while stirring for about 15 minutes.

(5) After the brown sugar is cooked, put it into the cooked sweet potato, and then add a proper amount of brown sugar and stir evenly.

(6) After boiling with high fire, it can be eaten out of the pot.

3. Practice 3

(1) Prepare appropriate amount of sweet potato, corn residue and sugar.

(2) Wash the sweet potato with clear water, peel it and cut it into small pieces for later use.

(3) Boil the water from the pot, and after the water is boiled, add a proper amount of corn residue and cook it with high fire. You can turn down the heat until there is foam in the pot.

(4) Cook with low fire for about half an hour. During this period, don't stop using chopsticks to stir to avoid sticking to the pot.

(5) After the corn residue becomes thick, you can add the sweet potato and stir it slowly with chopsticks. Cover the pot and cook for half an hour. When the sweet potato becomes soft, it can be eaten.