In a shallow dish mash the banana until smooth. Add the eggs, milk, cinnamon and vanilla and whisk vigorously. Alternatively, you can place the ingredients in a jug and use a stick/immersion blender for a few seconds to mix the eggs and banana well.
Pre heat a large non stick skillet / frying pan over medium heat.
Dunk one slice of bread in the banana egg mixture, coating both sides. Remove and allow any excess mixture to drip back into the dish.
Add butter to the pan and once melted, place the bread slice in the pan. Repeat with more slices to fill the pan but make sure the pan isn't overcrowded.
Cook for 2-3 mins on each side until the surface is golden.
Add remaining butter and repeat with remaing slices.
