Its dark batter contains zero wheat — buckwheat isn't even a true grain, which is exactly why it became the everyday bread of Breton farmers for centuries.
A galette is a savory crêpe made purely from buckwheat flour, water, and salt, cooked paper-thin on a cast-iron bilig and folded into a square around ham, egg, and cheese. Market vendors flip them to order on wide round griddles, the batter hissing the moment it hits the heat.