Materials: 5 sweet potatoes and 5 pieces of tin foil.

1. First take out the sweet potatoes and clean them, as shown in the picture.

2. Prepare tin foil and wrap all the sweet potatoes in tin foil.

3. Wrap the sweet potatoes with tin foil, place them in a baking tray, and then put them in the oven.

4. Turn the oven on to 220 degrees and bake for 60 minutes, as shown in the picture.

5. Finally, when done, take it out of the oven, remove the tin foil and serve.