Pour 135 g of water over the coarse multigrain flakes or oat flakes, sunflower seeds and flax seeds and stir. Let it soak for 2-3 hours.
Put the remaining ingredients and the swelling piece in a mixing bowl and knead slowly for 3 minutes, then knead quickly for 3 minutes. Let rest for 30 minutes.
Now shape into a round or oblong shape, moisten slightly and roll in oat flakes. Let rise in the proofing basket for about 2 hours until the volume has doubled.
Bake at 240 ° C for 20 minutes, finish baking at 180-200 ° C for 40 minutes. Moisten the dough well and vigorously spray water into the oven 2-3 times during baking.
For the autumn sun just before baking, cut into the dough several times in a star shape with a knife.