The Sandwich Potée Auvergnate is a boiled dinner folded into bread. The potée auvergnate is the Auvergne's slow pot of pork and cabbage: a piece of salt pork or shoulder, a length of saucisse, sometimes a knuckle, simmered with green cabbage, potato, turnip, and carrot until the meat shreds under a fork and the vegetables take on the fat of the broth. To make the sandwich you lift the solids out of the pot, let them drain and cool enough to handle, pull the pork into coarse threads, slice the sausage, press the cabbage of its liquid, and pack the lot into a split crusted loaf. The broth stays in the pot. What goes between the bread is the drained dinner, not the soup. The region is Auvergne.
The craft is entirely a matter of moisture. A potée is a wet dish by design, and a wet dish destroys bread, so the whole technique is drainage: the cabbage wrung out, the pork blotted, the sandwich built only once the filling has stopped weeping. Done right, the bread holds because it is carrying drained solids rather than ladled stew, and the crust gives the soft, fat-rich interior something to push against. The pork brings the salt and the richness, the cabbage brings sweetness and a little structure, the potato can be smeared along the crumb to bind. It eats best slightly warm, never hot and never fridge-cold, which is exactly the window when yesterday's pot has come down to room temperature and the cook is deciding what to do with the leftovers. Mustard along one face is the usual correction: a sharp Dijon cutting back against the boiled fat keeps the sandwich from going heavy by the third bite.
Variations follow whichever cut of the potée was strongest that day, more sausage in one version, more shredded shoulder in another, a few slices of the boiled carrot left in for color and sweetness. Some cooks add a wedge of a local cheese; most let the pork carry it alone. The Sandwich Potée Auvergnate belongs with the regional dishes the catalog groups under Plat-en-Sandwich, the casseroles that get a second life pressed into a loaf. Its specific contribution is a whole cabbage-and-pork boiled dinner reduced to its drained solids, which is the only form in which a soup can become a sandwich.