Finely grind the oats and wheat. Heat the buttermilk to 30 ° C. Crumble the yeast into the buttermilk and add the honey. Add the buttermilk and salt to the cereal. Knead vigorously for about 10 minutes.
Grease a loaf pan and fill it with the batter. Let rise for about 30 minutes. In the meantime, lightly toast the oatmeal in a pan without fat. Brush the risen dough with water and sprinkle with the oat flakes.
Bake at 220 ° C for 40-45 minutes. Remove from the mold and let cool down.