For the source piece, roast the kernels and pour the water over them while it is still hot. Let soak for at least 1 hour.
After swelling, pour off excess water and place the seeds with the remaining ingredients in a food processor. Process everything with the spiral mixer on level 2 in 7 minutes to a smooth dough. Cover and let rest for 30 minutes. Now work first round and then long on a well-floured work surface. Warning, the dough is very soft! Place well covered in a proofing basket and cook for approx. 1 hour.
In the meantime, preheat the oven to 250 ° C top / bottom heat.
At the end of the cooking, push in the bread with a lot of steam, cut into the surface as desired. Bake for 15 minutes. Now lower the temperature to 200 ° C and bake the bread in another 40 minutes.