One of the most sought-after, great delicacies in Hong Kong, these are literally birds’ nests made of regurgitated spittle by birds of the swift family from the East Asian tropics (Thailand, Vietnam, Java and the Philippines). Their nests are found in large caverns where workers climb on long bamboo scaffolding to retrieve them; it is dangerous work. Bird’s nest is said to be good for the complexion and, because it is almost pure protein, is prescribed for those recovering from long illnesses. There are shops in Hong Kong that specialize in bird’s nest of all grades. The top ones are the ‘white nests’ and ‘pink or blood nests’ that are literally complete cups. The nests are expensive and are usually sold precleaned — that is, with all feathers and other debris hand-plucked from the nests. They are sold dried and must be soaked before using as instructed in the recipes. The result, like shark’s fin, is a tasteless, soft, crunchy jelly that relies for flavour on whatever sauce or broth it is served with. Bird’s nest is an acquired taste.