Add chopped apples to a pan along with 4-5 tbsp of water. Cover and cook over a low heat until tender (7-8 mins). Drain (if any water remaining) and add to a high speed blender / food processor along with the remaining ingredients. Blitz until smooth.
Line a small baking tin / dish (mine was 13cm x 13cm - approx. 5x5" but a loaf tin would work well too).
Pour mixture into the dish and freeze for approx. 2 hours. Cut into cubes and return to freezer in a covered container or bag to store. Enjoy straight from the freezer.