Its telltale fennel-seed flavor is said to trace back to a monk named Father Longeot, who supposedly added a handful of local black fennel seeds to an ordinary sausage recipe centuries ago.
Fresh pork, jowl, and pork rind are ground together and seasoned heavily with fennel seed, stuffed into casing, and typically poached or braised rather than dried. Geneva market stalls and winter street stands sell it sliced hot, often alongside potatoes or lentils.