Knead all the ingredients. Best in the food processor and knead for 10 minutes until the dough is nice and smooth and fine-pored. Put the dough in a sufficiently large and floured round container with a lid, put the lid on it and put it in the refrigerator for about 7-12 hours. Then preheat the oven to 240 ° C top / bottom heat. Only then should you take the dough out of the refrigerator. It should have risen well (at least twice as high), fall onto a floured board, do not knead any more! Turn the dough strand two or three times and place it on a baking sheet lined with baking paper. Immediately place in the preheated oven (2nd stage from the bottom). Bake for about 15 minutes at 240 ° C, then switch the temperature down to 220 ° C, open briefly, spray a few splashes of water on the bread and bake for about another 20-25 minutes (depending on the desired browning).