Peel the banana and cut into thin slices. Lay out the crepes and always top half of the crepes with banana slices. Distribute the chocolate chips and walnuts evenly on the bananas and sprinkle with mini marshmallows. Fold the free side of the crepes over and place the parcels in a baking dish. Bake the crepes in the oven for 10 to 15 minutes until the marshmallows have melted.
Tip: Serve the chocolate temptation with a glass of ice-cold milk.