Kiln' is' to', right? When "baking" the sweet potato with microwave, put the sweet potato in the container and put the lid on it, without adding water. The steam generated by the moisture of sweet potato itself during heating is steamed. Then remove the cover and steam for two minutes to dry the skin, which is almost the same as baking. If you roast sweet potatoes in the barbecue function, you don't need to add water. But it takes a long time to cook.