Beijing's famous ass roll

There are various versions of the names of donkey rollers. The most interesting is the version that my friends in Beijing gave me. It was said that in the Qing Dynasty, the chef had made an old cake for the Emperor, and the young eunuch accidentally dropped it into a barrel full of beans. It's too late to redo a new one when it turns out it's full of bean noodles. The young eunuch had to hang on to his head and present this pastry to the Emperor. The Emperor was surprised to see it and asked him what it was. The young eunuch made up a name, saying that the dish was called a donkey rolling, because it was like a donkey rolling on a yellow ground and covered in yellow soil. When the Emperor eats, he thinks it tastes good. Ask the eunuch how. The young eunuch then told the Emperor what had happened, and instead of being angry, he praised him. Since then, this snack has become a local snack in the Beijing tunnel。