Mix the soft butter with sugar and bourbon vanilla sugar until foamy and gradually add the eggs. Mix flour with baking powder and add to the batter. Finely grate the zucchini and squeeze out. Mash the bananas and stir in with the zucchini grated, yogurt and almonds. Finally fold in fresh blueberries and place in a greased loaf pan (30 x 11 cm makes about 14 slices).
Bake in the preheated oven at 180 degrees top / bottom heat for approx. 55 minutes. Use a wooden stick to test whether the banana bread is ready and let it cool completely in the pan.
Turn the zucchini-blueberry-banana bread out of the mold, serve with fresh blueberries and enjoy slice by slice!