To serve, unwrap chicken, thickly slice and arrange on a platter, scatter with green onion and serve with dressing to the side.
This Chinese classic has many claimants. Some authors suggest its origin is Beijing while most believe it is from the Shanghai region. I have also come across references that date it back to the Tang Dynasty, but these claims are rather dubious. Because of its long pedigree, there are several ways to make this delicious cold starter. One of the best I've ever tasted is at Man Wah Restaurant at the Mandarin Oriental in Hong Kong - made all the more exciting with the addition of a green onion and ginger dressing. The recipe below is adapted from that fabulous restaurant.