主要食材：紫薯260克，白糖40克，芝士少许，黄油10克，手抓饼三四张，一个蛋黄，白芝麻少许。 Main ingredients: 260 grams of purple sweet potato, 40 grams of white sugar, a little cheese, 10 grams of butter, three or four pieces of hand-held pancakes, one egg yolk, and a little white sesame.