Whisk the eggs with the milk and vanilla extract and pour onto a plate.
Make 2 sandwiches.
Spread peanut butter on one slice, mash half a banana on top, on the other side spread nutella, sandwich together and press down firmly.
Cut the sandwich in halves or quarters and dip in the egg before frying in a fairly hot pan, sprayed with a little oil, until crisp with an oozing centre.4,