For the pre-dough, mix all the ingredients together and cover and leave to stand for 12-16 hours at room temperature.
Dissolve the yeast in 1 tablespoon of warm water.
Knead all ingredients in the food processor (dough hook) on low setting for 5 - 10 minutes to form a smooth dough. Cover and let rise in a warm place for 1 hour. Knead again vigorously by hand and place in a floured proofing basket. Leave covered for another 40 minutes until the volume has increased significantly. Carefully fall onto a baking sheet lined with baking paper and cut the surface several times. Bake in the preheated oven at O / U 240 ° on the second rack from the bottom for 15 minutes, switch the temperature back to 180 ° and bake for another 25 - 30 minutes (tapping test).