Flammkuchen is a traditional dish from the Alsace region of France and southwestern Germany. It consists of a thin, crispy crust topped with a mixture of crème fraîche, onions, and lardons (small strips of bacon). The dish is often baked in a wood-fired oven, giving it a unique flavor and texture. Originally, Flammkuchen was a way for bakers to test the temperature of their ovens before baking bread. Today, it is enjoyed as a popular appetizer or main dish, with various toppings available, including cheese, vegetables, and herbs, catering to different tastes.