“斜日荒城红薯大,晓风山社绿柳多。”这是清代光绪元年何澂宇到台湾时,见当地红薯丰收而咏的诗句。地瓜在南方叫红薯、番薯、白薯。现在,人们提起地瓜,总把它当为充饥度荒的食品,其实地瓜在清代嘉庆年之前,还是“御用贡品”,每年由福建巡抚进贡数十篓“紫皮红薯”供皇家品尝。而且当时在北京亦为时令食品,据《燕京岁时纪胜》载:“京师十月以后则有栗子、红薯等物。红薯贫富皆嗜,用火煨熟,自然甘美”。这就是北京的烤红薯。地瓜煮熟吃后,有人感到肚胀和吐酸水,其实只要久煮一下,把里面的氧化酶破坏就不会吐酸肚胀了。 “Obsidian Dayton City sweet potato big, Xiaofeng Hill Green Lvliu.” This is the first year of the Qing Dynasty Emperor Guangxu He Yu to Taiwan, see the local harvest of sweet potatoes and poetry. Sweet potatoes in the south called sweet potatoes, sweet potatoes, sweet potatoes. Now, people bring sweet potatoes and treat them as famine and waste food. In fact, sweet potatoes are the royal tribute made by Fujian governors every year before the year of Jiaqing in Qing dynasty. And at that time, it was also a seasonal food in Beijing. According to the book, “Yanjing’s age-old Jisheng” contains: “After the capitalists have chestnuts, sweet potatoes and other things after October, sweet and sour potatoes are rich and poor, and they are cooked with fire and sweet and natural.” This is the roasted sweet potato in Beijing. Sweet potato cooked to eat, some people feel bloating and spit acid, in fact, as long as a long cook, the inside of the oxidase damage will not spit it.