Büsumer Fish Soup Büsumer (or Büsumer Deichhausen ) is situated on the North Sea coast of Schleswig-Holstein, Germany and is apparently the source of today's soup. I haven't made very many of the fish soups in The Soup Book , mainly because I haven't felt sure that I would be able to get the necessary ingredients. There are thirty-two fish soup recipes and so far I have made just five; Büsumer fish soup is my sixth. The listed ingredients include carrots, potato, onions, vegetable stock, a bay leaf, haddock or pollock, lemon juice, prawns, chestnut or button mushrooms, and fresh dill. I bought the fish in a recently opened fish shop. I was agreeably surprised that the fish monger had both haddock and pollock on display. I asked him what the difference was between the two. He said that pollock was "meatier," more like cod. When I told him I was following a soup recipe, he immediately urged me to buy the pollock. He also shelled the prawns for me. I used some v...