Divide half of the natural yoghurt between two glasses and drizzle some maple syrup over them. Spread a tablespoon of muesli on each. Spread the washed blueberries and raspberries on top, keeping a few berries on top. Spread the rest of the yogurt and pour some maple syrup over it. Put the last spoonful of the muesli on top.
Sprinkle the rest of the berries on the dessert, dust with a little icing sugar and put some mint on top for the garnish.