Bake in the oven at 180 degrees for 40 minutes.

First prepare the materials: sweet potatoes: 3 pieces, water: appropriate amount.

1. Rinse the sweet potatoes.

2. Add water and put it into the pot.

3. Cover and cook for 15 minutes.

4. Wrap it in tin foil after taking it out of the pot.

5. Bake in the oven at 180 degrees for 40 minutes.

6. After 40 minutes, the sweet potatoes will be ready to eat.