Bratheringbrötchen

Bratheringbrötchen belongs to the northern table, the fish counter, the market stall, the weeknight plate when the work was done yesterday. Fresh herring is floured and fried, then laid under a hot vinegar-onion brine so it keeps and tastes of more. That is the old coastal logic: cook it, sour it, eat it cold. Weggeworfen wird nichts, even the onions from the brine go into the roll.

Along the North Sea and Baltic coast the argument is mostly the brine. Schleswig-Holstein likes it sharp and clean with bay and mustard seed; Hamburg often wants more onion and a little sweetness; further inland the fish may land beside fried potatoes instead of in a Brötchen, a bread roll. Im Norden anders, im Süden anders. The south has its sausages and dumplings. The coast has herring.

The technique that decides it is this: pour the brine over the fish while the brine is hot, but let the fried herring cool first. Hot brine pulls the onion and spice into the fish and firms the flesh; hot fish trapped under vinegar goes soft and greasy. Then leave it overnight. Das braucht seine Zeit. The roll is quick because the herring wasn't rushed.

Build it cold, with butter or a thin spoon of mustard if you want it, not a puddle of sauce. Nicht aus dem Glas, no jarred fish with tired vinegar if you can fry your own. The bread should crack when you bite it, the herring should taste sweet-sour and clean, and the onion should still have a little bite.