【ENG SUB】紫薯卷的做法，香甜软糯，营养健康，简单易做

Ingredients required: 500g flour, 5g yeast, 4g sugar, 260ml water, 1 purple potato
所需食材：500g面粉，5g酵母，4g白糖，260ml水，1个紫薯

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