Sweet potatoes can be cooked in a steamer, as long as the steaming time is enough.
How to steam sweet potatoes in a steamer
Steps:
1. Wash the sweet potatoes and drain them.
2. Place on a baking sheet or grill, and place a piece of tin foil at the bottom of the oven.
3. Place the grill rack in the middle rack and the baking sheet in the lower rack of the oven.
4. The temperature is 200 degrees, and then baked for 1 hour.
5. You can take it out with insulated gloves and turn it over halfway.
6. Bake until it is soft to the touch and some brown sugar juice precipitates on the surface.