Mix together durum wheat flour, dry yeast and water and leave to ferment covered at room temperature for 12 hours.
For the dough:
Mix the durum wheat flour, salt, water and the pre-dough until you get a very moist dough.
Place the dough on a lightly floured work surface and knead for 10 minutes until it is smooth and elastic. Since the dough is very soft, it may be necessary to use a spatula to work the dough.
Cover the bowl and let the dough rise for about 30-45 minutes, until it doubles in volume.
Place the dough on a well floured work surface and knead with floured hands and a dough scraper for 10 minutes, adding just enough flour that the dough is just about to work.
Carefully divide the dough into 2 portions, form 2 round loaves and place on a baking sheet. Cover and let rise for about 30 minutes until they have doubled in volume.
Preheat the oven to 240 ° C, put the lightly floured bread in the oven and reduce the temperature to 200 ° C. Bake the loaves for 30 minutes, until the crust is golden brown and it sounds hollow.