The Sandwich Comté-Saucisse de Morteau is a Franche-Comté pairing of two things the region is known for, and it works because the two things were made to sit next to each other. Comté is the hard cow's-milk mountain cheese, aged firm and nutty with a deep brothy sweetness; the saucisse de Morteau is the fat smoked pork sausage from the same valleys, dense and coarse-ground, carrying a clear woodsmoke note from how it is cured. The build is a sturdy crusted loaf split lengthwise, a thin spread of butter if anything, slices of cooked Morteau laid along the bread, and shavings or thin slabs of Comté over them, the two regional products doing the whole job.
The logic is that each component covers what the other lacks. The Morteau brings fat, salt, and smoke but reads one-note on its own; the Comté brings a long sweet nuttiness and just enough acidity to cut the sausage's richness, so the pair lands fuller than either alone. The constraint follows from that: both are assertive, so the supporting cast stays minimal, a little butter to bridge them to the crust and not much else, because a strong condiment would only crowd a sandwich that is already two strong things. The sausage is best sliced from a piece cooked through and cooled enough to hold its shape, not crumbled, so it sits in defined bites against the cheese. The bread needs a real crust because the filling brings no structure of its own, and the sandwich is best within a few minutes of assembly, while the Comté is still supple and the sausage's fat has not gone firm against the crumb.
Variations stay inside the Franche-Comté larder rather than wandering off it. A younger Comté gives a milder, creamier reading that lets the smoke come forward; a long-aged one turns sharper and more crystalline and pushes back harder against the fat; a smear of the region's whipped cancoillotte in place of sliced Comté trades structure for a runnier, tangier register. Each holds the Morteau constant and changes only the cheese beside it. It belongs with the cheese sandwiches the catalog groups under Baguette Fromage. Its specific contribution is a two-product pairing from one region, a smoked sausage and a hard mountain cheese set against each other so neither has to carry the sandwich alone.