Remove pastry from freezer to thaw and preheat oven to 200°C. Peel and chop bananas and mix with ginger and chocolate. Cut pastry sheets in half and place one quarter of the mixture along the centre of each piece. Roll up, pinching the ends. Brush pastry with melted butter or egg.

Place on a baking sheet lined with silicon paper and bake in pre-heated oven for 20-25 minutes or until pastry is golden.