We often imagine a thin tart as a restaurant dish, precise and technical, reserved for ambitious Sundays. The reality is much more generous: it’s one of the most honest weekend recipes, one that asks for almost nothing and gives back more than we hoped. Forty minutes, a baking sheet, and the oven does the rest.

What comes out of the oven has that color you don’t try to reproduce — a deep golden on the edges of the dough, almost amber, with slices of reblochon that have melted and slightly caramelized on top. The potatoes have absorbed the cream and the juice of the cheese. It smells like the mountains without the fuss: something simple, warm, direct. The crust cracks when you cut it, and that fine resistance under the knife already announces the texture to come.