A Copenhagen Hotdog. A Danish style Hot Dog with ketchup, mustard, remoulade, onions, and pickled cucumbers. Hot dogs are a favorite Danish street food, and this recipe shows you how to make the authentic version. On top of the usual ketchup and mustard, it also gets topped with remoulade—a tangy, mustardy mayonnaise—both raw and fried onions, and pickled cucumbers.
