Pour the yoghurt over the oat flakes, the salt and the finely grated apple, stir and leave to soak for about 1 - 1.5 hours.
Add the crumbled yeast, oil and flour. Knead all ingredients together well in the food processor until the dough comes off the bowl (add 1 tablespoon flour if necessary). Then cover and let rise to three times its size in a warm place.
Then knead again thoroughly (the food processor does that too) and shape a loaf. Covered again and let rise to double size in a warm place.
Dust the top with flour. Then bake in the preheated oven for about 30 minutes at 200 ° C (convection 180 ° C).