Knead all ingredients for 5 minutes on level 1 with the spiral mixer to form a smooth dough. Cover and let rest for 15 minutes. Now work first round and then long on a floured work surface. Cover and leave to rise in the proofing basket with the end on top.
In the meantime, preheat the oven to 250 ° O / U. After cooking, turn the dough out onto a baking stone or a heated baking sheet and rub it off with water. Bake with plenty of steam for 10 minutes. Now reduce the temperature to 220 ° and bake for another 40 minutes. Wipe with water immediately after baking.