The Tourton Garni is the Alpine fried dough pillow with something tucked inside it, and the frying is what makes it a sandwich rather than a turnover. In the Alps the tourton is a thin rectangle of pastry dough, folded around a filling, sealed at the edges, and shallow-fried until the outside blisters into a crisp golden case and the inside steams soft. The fillings split two ways. The savory pillow carries potato mashed with garlic and a little cheese, sometimes a slice of mountain ham worked in. The sweet pillow carries stewed fruit, prune or apple, or a spoonful of jam. Either way the dough is the constant and the filling is the variable, and the format is a sealed parcel of bread eaten hot in the hand.
The craft is what the fry does to a stuffed dough. Sealing the filling inside before it hits the oil means the parcel cooks in its own steam while the shell crisps, so the case shatters slightly at the first bite and the inside arrives soft and hot. That contrast is the point of the form: a brittle fried exterior against a yielding, savory or sweet core, portable and made to be eaten standing wherever it was fried. The constraints are heat and timing. The dough has to be rolled thin enough to crisp through rather than stay raw at the seam, the filling has to be cooked or cookable in the time the shell takes to color, and the tourton is best within a few minutes of leaving the oil, because the case that is crisp hot goes leathery as it cools and the steam that kept the inside soft turns it dense. It does not travel and it does not wait, which is why it stays a market and fairground food rather than a packed lunch.
Variations track the two fillings and the Alpine pantry around them. The potato-and-cheese tourton runs savory and dense; a ham-laced version reads richer; the prune or apple tourton turns the same fried pillow into a sweet. The Tourton Garni belongs with the folded and griddled French breads the catalog groups under Crêpe & Galette Salée, the tradition of a thin batter or dough wrapped around a complete bite. Its specific contribution is the fry: a sealed dough parcel cooked in oil so the shell shatters and the filling steams, the rare French sandwich whose bread is deep-crisped rather than baked or toasted.