Lamb and Jerusalem Artichoke Soup

Jerusalem artichokes may taste like artichoke, but they are really a relative of the sunflower. The explorer Samuel de Champlain ate them during his travels in Canada, and wrote home about their artichoke-like flavor, beginning the confusion. Why they were linked to Jerusalem is less clear. One suggestion is that it is an English corruption of the Italian word for sunflower, girasole. Today they are often called sunchokes and their earthy flavor matches well with lamb stock. Once you