1. Remove a lid from the top of each orange (retain the lid).
2. Carefully remove all the pulp from the orange-I use a dessertspoon to do this.
3. Allow the ice-cream to soften for a minute or two, then working quickly, stir through the liqueur and concentrate and fill the orange shells with this mix.
4. Replace the lids.
5. Freeze for at least 6 hours but preferably overnight.
6. Remove from the freezer about 10 minutes before serving so they go frosty.
7. These look good with a sprig of orange or lemon leaves poked into the top before serving*note-don't be tempted to use the pulp in place of the concentrate, the flavour is all wrong.
8. Use the pulp for juicing or something.