Flammkuchen

Flammkuchen belongs to the Upper Rhine, strongest in Baden, the Palatinate, and across the border in Alsace, where the old bread oven decided the meal. The baker slid in a thin tart to test the oven heat before the loaves. If it scorched in a minute, too hot. If it sat there pale, not ready. Good Flammkuchen still carries that rule: fierce heat, thin dough, no heaviness.

The regions argue over the dairy and the dough. Alsace leans on crème fraîche and fromage blanc, Baden often uses Schmand, the sour cream with more backbone, and the Palatinate wants it beside Federweißer, the young fermenting wine of autumn. Some cooks use a yeast dough. I don't here. For the crisp, thin border tart, oil dough is enough, because the topping is rich and the base should crack clean under the teeth, not chew like pizza.

The one technique that decides it is rolling. Roll the dough so thin you can almost see the board through it, then bake it on a preheated steel, stone, or heavy tray at the hottest setting your oven gives. Thick dough bakes slowly, the onions weep, and the dairy turns dull before the edge blisters. Thin dough and hard heat make the whole thing work in minutes.

Use good smoked bacon, slice the onion thin, and don't bury the tart. Weggeworfen wird nichts: keep the bacon rind for the next lentil soup if your butcher leaves it on. This is food for a weeknight, a wine table, or a board passed outside while people stand around pretending they'll only have one piece.