1. Wash the sweet potatoes and wipe off the excess water. Try not to choose sweet potatoes that are too big, choose smaller ones, which are better to bake.
2. Then put a piece of tin foil on the baking tray and put the sweet potatoes on top of the tin foil (preheat the oven to 210 degrees)
3. Put it into the middle of the oven and bake at 210 degrees for 90 minutes. You can use chopsticks to poke the baked sweet potatoes to determine if the sweet potatoes are cooked (the temperature is for reference only)
4. The roasted sweet potatoes are hot and freshly baked, they are really delicious
