mustard bumps.

The old pickle in Yangqu County, Taiyuan, also known as mustard pimple, is a traditional local food in Shanxi. It is made of mustard as raw material through pickling, fermentation and other processes. It tastes salty and spicy. This old pickle has a long history and has been passed down to this day. It is one of the favorite foods of many Shanxi people. The method of making old pickles in Yangqu County, Taiyuan is unique. It is necessary to choose fresh mustard, remove leaves and roots, and leave only mustard bumps. Wash it, dry it, and then marinate it with salt, pepper and other seasonings for a period of time. Take out the pickled mustard knot and dry the surface moisture. Put the dried mustard knot in one's heart into a jar, compact it with heavy objects such as stones, seal the jar mouth, and put it in a cool and ventilated place for fermentation.