On the fifth day of the fifth lunar month (the day of the Dragon-Boat Festival), they had to present an offering to the god of the sea. But with no rice to make traditional zongzi, they instead made a cake from yam paste, bean sprouts, shrimp and other seafood.
適逢農曆 5 月 5 日，必須祭拜水神屈原，卻沒有米可以包粽子，只好用蕃薯粉打漿，再和豆芽、蝦等海產煎成餅，代替粽子當作祭品，當時稱為「煎（食追）」，就是蚵仔煎的前身。