The story goes that someone from Audincourt in the Franche Comté recommended turnip-eating to Napoleon’s armies, earning the good folks of that region the eternal nickname of Turnip-eaters, or Croque-Raves.
They do use their turnips to make raves salées (coarsely grated, sautéed in duck or goose fat) to prepare a dish similar to choucroute garnie with the local Saucisse de Montbéliard, saucisses de Strasbourg, bacon, potatoes etc. And like sauerkraut, you can buy your raves salées ready-made in regional supermarkets.
Image by monique