Knead all ingredients into a smooth dough and shape into a round shape. Cover and let rest for about 10 minutes. Flatten the dough and tear off 8 pieces.
Flour two flat pieces at a time and place them on top of each other. Roll it up so that there is still an open slit at the bottom. Place this side on a floured kitchen towel and let rise covered for 1 hour.
Preheat the oven to 220 ° C and place a drip pan with water in the oven.
Place the pieces of dough upside down on a baking sheet lined with parchment paper. Put the tray in the oven, after about 10 minutes reduce the temperature to 200 ° C and bake for about another 20 minutes.