Cock a Leekie Soup is a soup, traditionally served in the winter, made with leeks and chicken stock. It is frequently served as a starter at Scottish events such as Burns Night, St Andrews Night and at Hogmanay. As www.scottishrecipes.co.uk explains, the soup dates back to the 16th century when a fowl would be boiled with vegetables such as leeks to provide a filling broth and this is why Cock a Leekie soup is so named. A traditional Scottish Cock a Leekie soup recipe includes prunes though some cooks will leave the prunes out of their recipe because they are not to everyone's taste. Other chefs will include the prunes in the cooking of Cock a Leekie soup but will remove them before serving the soup.