This hearty soup, a favorite of Jamaican restaurants and home cooks alike, can easily pass as a stew. In fact, think of it as a chili alternative, just as thick and spicy. The dumplings are easy, and cook in the soup, but they’re entirely optional. Other versions of this soup may call for salted pig tails, but here, they’re swapped out for smoked turkey necks. Either one adds a deep smokiness. Cock-flavored soup mix, such as one from Grace, gives this soup yet another layer of flavor; you…