Dissolve the coffee in the water. Puree the bananas. Add all liquid ingredients and mix. Mix whole wheat flour, oat flakes, linseed, salt, cinnamon, pulp of the vanilla pod and baking powder in a bowl, mix with the liquid ingredients and make a batter. Finally chop the chocolate and fold in.
Grease a loaf pan with melted coconut oil and add the batter. Sprinkle with oatmeal. Bake at 180 degrees in a preheated oven for about 50 minutes.