Forellenbrötchen

At a trout farm in the Black Forest the fillet comes off the smoker still warm, gets carried to a counter built over the holding ponds, and goes into a split roll while you watch. This is where the Forellenbrötchen makes the most sense: not at a harbour but inland, at a Forellenhof or a mill pond where the fish was raised, smoked, and sold within a few metres. The trout is a freshwater animal, grown in cold spring water rather than netted at sea, and the roll exists so you can eat one on your feet by the water that produced it.

The fish sets this roll apart from everything on the German coast, and it does so by where it lives. Coastal rolls are built on herring and cod, sea fish cured in vinegar, ripened in brine, or battered and fried. This one is built on Forelle pulled from a freshwater pond and cooked through in a smoke oven until the flesh turns opaque and flakes off the spine in warm, oily pieces. Smoke is the seasoning and heat is the method, and the result reads gentler and sweeter than anything that comes off the North Sea.

Two things decide a good one, and the first is the smoke. A fillet caught at the right moment lifts off the spine in big tender pieces still tasting of the wood; held too long over heat it dries to cottony shreds that fall apart in the roll, and one taken cold from a case sits waxy with the fat set tight. The second is the bones. Trout is a fiddly fish, and a fillet boned carelessly turns a bite into a hunt for pin bones with the tongue. The roll under it should be a plain soft-crusted Brötchen split and laid generously, sturdy enough to hold an oily fillet without fighting it or going to paste beneath it.

The horseradish is the lift, and a fresh-grated root is the version that announces itself. Spread thin under the fish, raw Meerrettich catches at the back of the nose on the first bite and clears the sinuses in one breath, a clean sharp heat that lasts a second and is gone; the creamed Sahnemeerrettich rounds that into something mellow that still cuts the oil. Bite in and it is butter and soft crust, then a warm dense flake tasting of woodsmoke and river rather than brine, then the onion snapping cold through it and the root climbing up behind the teeth. Lemon, when the counter offers it, brightens the last of the fat.

Its setting is the day trip, not the working dock. The Forellenbrötchen belongs to the Forellenhof and the Ausflugslokal, the rural trout restaurant and farm shop that people drive out to on a Sunday, in valley country in Baden-Wurttemberg, Bavaria, and the low mountain ranges where cold streams feed the ponds. What the counter asks is which Meerrettich you want, the mild creamed kind or the raw grated one that bites. Buying the fish from the same operation that raised and smoked it is a different transaction from lifting a cured fillet out of a tub at a kiosk, and a regular will have an opinion on whose smoke is best.

The variants stay close to the smoked fillet: blend the trout into cream cheese with a little lemon and you have a Forellencreme, a paste rather than an intact fillet and a related but separate thing; cucumber and dill push it toward a lighter salad roll; swapping the horseradish for Remoulade makes it milder and creamier. Its nearest coastal relative is the Makrelenbrötchen, hot-smoked mackerel with horseradish in a roll, which shares the smoke and the root but pairs them with an oily sea fish off a harbour stand rather than a lean freshwater one from a farm pond. The river fish and the sea fish answer the same smoke in two different waters.

A Fish Carried In From California

The history here is the history of fish farming, not of a harbour. Trout aquaculture in the Black Forest reaches back to the eighteenth century, when the first farms were dug in the region's cold spring-fed valleys, and by the late nineteenth century fishing clubs were forming as wild stocks in the streams thinned. The roll itself has no inventor and no founding year; it is the convention that grew up around selling a smoked farm fish to a visitor who wanted to eat it on the spot.

The fish most likely to be in that roll has a precise arrival date. The rainbow trout that dominates German trout farms is not native; it was brought to Germany in 1882 from North American stock that traced to a California hatchery operation begun around 1870, and German fish farms went on to become a major secondary source that spread the species across Europe. The native brown trout, the fish the Black Forest's protected Schwarzwaldforelle designation is built on, had been farmed in the same waters far longer.

So the cooking is old and local and the smoke older still, but the animal in a modern Forellenbrötchen carries a documented date the dish itself does not. Of the roughly two thousand rainbow-trout eggs shipped to Germany in 1882, about four hundred survived and were dispatched to hatcheries at Freiburg, Hüningen, and Starnberg, and those few hundred fish seeded the farmed Regenbogenforelle now grown in the valley ponds where the roll is sold.