Canh bóng is a traditional soup originating from Vietnam, and it's particularly popular in Hanoi during the Lunar New Year (Tet) celebrations. The main ingredient in the soup is dried pork rind, which is cleaned, washed with ginger juice and vinegar, dried in the sun, and roasted in order to develop bubbles on the surface.

The dried rind is usually seasoned with scallions, fish sauce, ginger, and pepper, then cooked with vegetables such as broccoli, carrots, and mushrooms. The soup is presented in a bowl that's topped with the cooked rind, which will float on top of the soup with all the other ingredients.