Saucisse de Morteau

The Saucisse de Morteau is named for the town of Morteau in the Haut-Doubs and is documented from the 16th century, when it emerged alongside the farms built with a tuyé — a vast pyramidal central chimney, some 12 to 15 metres tall, in which the montagnards of the high Jura hung meat to smoke and keep it through the long winter. Its modern identity rests on a strict cahier des charges: production is limited to the four Franche-Comté departments (Doubs, Jura, Haute-Saône, Territoire de Belfort), the pigs are partly raised on whey from the region's cheese dairies, and each sausage is closed with a wooden peg. It was homologated as a French IGP by an order of 10 July 2009 and registered as an EU protected geographical indication in 2010 (Commission Regulation No 751/2010); a larger-calibre version stuffed into the caecum is sold as the Jésus de Morteau.

Cut warm, the slices are coarse and meaty, flecked with white fat that has turned silky rather than greasy, and the smoke runs all the way through — woody and resinous from the conifer, not acrid. A good Morteau is firm and juicy, never dry or crumbly; the cure gives it a faint lactic tang under the smoke. Served over lentils, the earthy pulses soak up the fat and smoke, while a boiled potato carries the flavour plainly. The skin should stay taut and snap cleanly under the knife.

Morteau is preserved by three forces working together before it ever reaches the pot: salt, drying, and cold smoke. The salt draws out water and lowers water activity so spoilage bacteria can't multiply, while the smoke is applied cold — held low, around 12 to 22°C, well below the roughly 40°C at which fat begins to render and protein to set — so it flavours and dries the sausage without cooking the meat hard. Smouldering spruce and fir sawdust release phenols and carbonyl compounds that are both antimicrobial and antioxidant, laying down the resinous aroma and the deep amber colour while slowing rancidity in the fat. Because it leaves the smokehouse raw, the cook's job is gentle: poach it whole in water held at a bare 80 to 90°C, never a rolling boil, which would burst the casing and squeeze the fat out, leaving the meat dry. Pricking the casing is likewise avoided, so the juices stay sealed inside.