Knead all ingredients (except the rye flakes) with the spiral mixer of the food processor on the lowest setting for 5 minutes to form a smooth dough. Let rest covered for 30 minutes.
Then knead briefly on a well-floured work surface, grind round and leave to rise well covered in the proving basket for 2 hours. (If you like, you can sprinkle the proofing basket with rye flakes beforehand!)
Now bake in the preheated oven at 250 ° O / U for 10 minutes. Swath vigorously. Then turn the oven down to 200 ° and bake the bread in another 50 minutes.