The Galette Jambon-Fromage is the pared-down Breton galette: buckwheat batter folded around ham and cheese, with the egg of the fuller version left out. A thin buckwheat batter is cooked on a hot cast-iron crepière until it sets and lightens. Gruyère is laid on the surface to melt, a slice of ham goes over it, and the galette is folded into a flat parcel and served. Removing the egg changes the sandwich more than it sounds: without the yolk to add a running sauce, the structure rests entirely on the melted cheese binding the ham to the buckwheat, which puts more weight on the bread and the cheese to carry it.
That stripped-back construction is the point of the craft. Buckwheat is not a neutral wrapper. It has a nutty, slightly bitter character that, against just ham and gruyère, becomes the dominant note rather than a backdrop, so the sandwich tastes more of the bread than the complète version does. The galette is cooked thin and folded, usually four edges toward the centre, and the melted cheese is what holds the parcel shut as it cools slightly on the plate. It is eaten flat with a knife and fork, served straight off the iron while the edges still have their crisp, and washed down with cider in the same way the rest of the Breton galettes are.
This is a Brittany dish, and the ham-and-cheese version is the simplest fork in the galette tradition, the base before an egg or a sausage or smoked andouille gets added. The variations all keep the buckwheat and the fold and change what goes inside: an egg added back for the complète, a grilled sausage in another corner of the region, the sweeter wheat-flour crêpe for dessert. Those siblings, the savory galettes and their crêpe cousins, are gathered under Crêpe & Galette Salée, and the Galette Jambon-Fromage is its plainest member: the one that lets the buckwheat do the talking.