Preiselbeeren

Preiselbeeren are lingonberries (Vaccinium vitis-idaea), a small tart wild berry of cool northern and upland forests across Central and Northern Europe, and the preserve made from them is a traditional German accompaniment rather than a regional dish. Long gathered wild in mountain and heath country, the berries are too sharp to eat raw in quantity but cook into a fragrant sweet-tart compote that keeps well, which made them a natural foil for fatty meat in a cuisine fond of pairing roasts and fried cutlets with fruit. The lingonberry-and-Schnitzel pairing is standard across German-speaking lands; the berry should not be confused with the larger American cranberry, though jarred cranberry sauce is sometimes substituted.

Small, glossy, deep-red berries in a loose ruby syrup, tasting sharply tart and fruity with a faint bitterness and a clean astringency that lingers. It is not jammy-sweet like a dessert preserve but tuned to sit against savoury food, the acidity bright enough to slice through a fatty cutlet or rich game. A little goes a long way: a spoonful beside breaded Schnitzel or melting baked cheese makes the whole plate read fresher. Cool, vivid and bracing.

Lingonberries preserve themselves chemically. They are naturally high in benzoic acid, a built-in preservative, which is why traditional "raw" preparations could keep with only sugar and little or no cooking, and why a cooked compote stores so well. They contain enough pectin and acid to set into a loose gel with sugar alone, so only a short cook is needed — long boiling dulls both the colour and the fresh aromatic compounds. The sugar tempers but should never bury the sharpness; the point of the preserve is to keep the berry tart enough to cut fat, so it is sweetened far less than a dessert jam.