Tim, as a fan of Nigella's seville orange ice cream after the recipe you posted here, I feel I must share my latest discovery. Again, it is a nigella recipe: pomegranate ice cream, and it is stunning! Make it the same way as the original but it is the juice of two pomegranates and one lime [although I used a lemon because that's all I had], 175g icing sugar and 500mls double cream. :)