2. Wash and peel the yam and cut it into sections about 10 cm long; After the yam is coated with honey, a layer of blueberry sauce is coated; Wrap it in tin foil and put it in the oven; The temperature is set at 220-230 DEG C for 30 minutes; Blueberries and honey can be brushed after baking, which is more aesthetic, but before baking, the sweetness will penetrate into yam more easily and the fragrance will be stronger.