Preheat the oven to 230C/210C fan/gas mark 7 and place a 9 inch skillet with the oil in the oven while mixing the pancake ingredients.
In a bowl whisk all the ingredients together and pour into the hot skillet. Place the skillet in the oven on the middle shelf and bake for 15 minutes or until well risen, golden in the centre and darker around the sides.
Meanwhile start preparing the caramelized banana. Set a frying pan on medium heat with the butter, let it melt and slightly brown then add the maple syrup. Let it come to a boiling point then add the sliced banana and brown both sides.
Serve the pancake with ice cream, caramelized banana, a dusting of icing sugar and maple syrup.