As I was then working out the carbs I realised that it made for a pretty healthy and low carb breakfast for Frank.
We used 350g frozen raspberries, slightly thawed, and 300g natural yoghurt. Ice cubes can be added for more crunchy coldness.
It certainly floated our boat this Sunday and is a great way to eat berries that taste great but maybe aren't as pretty as the fresh ones flown in from Jupiter in your local supermarket.
(Confession: When Frank was younger I used to tell him this was "ice cream". He doesn't fall for that anymore. I also used to give him cornflakes and tell him they were crisps. I wouldn't get away with it anymore. The boy is snack-wise!)