Hamburger Aalsuppe

The soup belongs to the old North German sweet-and-sour tradition and is documented as a Hamburg specialty. Its name is the subject of a much-repeated pun: in Low German Aal means 'eel,' but the older form is thought to derive from all ('everything') — a soup of everything left over — so locals joke that a true Aalsuppe need contain no eel at all, and an eel-less version is teasingly called verlorene Aalsuppe ('lost eel soup'). Food historian Alan Davidson placed the addition of eel to this older sweet-sour soup in the 19th century, reportedly first by the fishermen's families of Finkenwerder. The pear-and-vinegar backbone links it to the wider North German pairing of fruit with smoked pork.

The first taste is the sweet-sour shock: sharp vinegar against the sugar of dried pears and prunes, all carried on a smoky, gelatinous ham-bone broth. Underneath are soft root vegetables and a tangle of green herbs, with little dumplings for body and, in the full version, tender pieces of poached or smoked eel. It reads as savory, then fruity, then sour in turn — a soup that keeps shifting on the spoon. Rich, warming, unmistakably northern.

The dish is an exercise in balanced opposition: vinegar (sour) against dried fruit and sugar (sweet), both anchored by a long-simmered smoked ham bone that gives salt, smoke, and gelatin for body. The bone must be simmered slowly to draw collagen, which gives the broth its slight cling. Dried pears and prunes are added late so they soften without disintegrating, releasing sweetness to meet the vinegar. Eel, when used, is poached gently and added near the end — overcooked eel turns oily and falls apart. The small flour dumplings (Mehlklöße) are dropped in to cook in the broth, thickening it slightly and turning the soup into a meal.