For the flaxseed bread, pour boiling water over the flaxseeds in a large bowl and allow to swell for at least half an hour.
Then drain the water and rinse the seeds in a fine sieve with cold water and let them drain.
Mix oat flakes, flour and yeast well. Add water, flax seeds and salt and knead with a hand mixer with dough hook, or by hand for 5 minutes.
Place the dough in a lightly floured bowl, cover with a clean tea towel and leave to rise in a warm place for 40 minutes.
Then knead the dough again briefly, form an oblong loaf and let it rise, covered, on a greased baking sheet for another 15 minutes.
Cut the bread diagonally a few times with a knife, brush with water and sprinkle with oat flakes and flax seeds.
Place the flaxseed bread in a cold oven, set the oven to 250 °C and bake on the middle rack for about 10 minutes, then turn the oven down to 200 °C and finish baking for about 40 minutes.