Preparing the sauce
Bring the blackcurrant syrup to the boil with all the ingredients up to and including the vanilla, remove the pan from the hob, allow to cool a little.
Peeling the oranges
Slice off the top and bottom of the oranges, then peel all round the fruit down to the flesh. Place the oranges into a wide bowl. Pour over the syrup, allow to cool, cover and steep in the fridge for approx. 12 hrs. Turn the oranges occasionally.
Cut the oranges into slices. Use an ice cream scoop to shape the ice cream into balls, serve with the oranges, drizzle over the syrup.