Xiaolongbao - or soup dumplings as they are known in the West - are delicate parcels of pork and broth that are served piping hot in a bamboo steamer. In this episode Alkira Reinfrank and Bernice Chan uncover the origins of this golf-ball sized dumpling, tracing it back to a district on the fringes of Shanghai, China. They speak to the daughter of a xiaolongbao master to find out what makes the perfect soup dumpling, and find out how Din Tai Fung began in Taiwan selling cooking oil then made…