If you want to talk about the authentic common people's dish in Beijing, it must be Mustard Dun. Whenever Chinese cabbage is on the market, you will think of the taste of Mustard Dun when you look at Chinese cabbage. Although the raw materials are easy to obtain, the mustard pier is very particular about making it. You must choose long and thin cabbage, hold the cabbage tightly, pour boiling water three times, and sprinkle the ingredients to cover it for three days. The strong taste of the mustard pier Only children can show it vividly. When you are tired of eating meat and vegetables, have a bite of mustard pie, which is refreshing and delicious, and it is very greasy.