Peel the bananas, and place them in a plastic container in the freezer. Leave for several hours – they must be totally frozen.
Use double cream instead of milk for a richer version.
Instead of the maple syrup, use rum, raisins or cinnamon.
The ice cream does not have a balanced amount of sugar, so it will freeze very firm if kept in the freezer overnight. The good news is that you get to eat it all straight away.