Melt the butter (I do it in a microwave).
In a large mixing bowl, beat two ripe bananas with a hand mixer until fairly smooth. Add the butter, one egg, the flour, vanilla extract, ground ginger and baking soda and beat until smooth.
Stir in chocolate chips and shaved coconut.
Roughly chop the remaining banana, add to the batter and mix everything together once again.
Grease the bottom and sides of the baking dish with extra butter and pour in the batter.
Bake in the preheated oven at 190C on the middle rack for 45-50 minutes or until a wooden toothpick comes out dry.
Remove from the oven, cover with foil and let cool.