OK Nicola. This is how you do it.
Use 300ml of HOT water (not boiling) and blend in whatever flavour shake you want to use with a blender in the usual way (Toffee & Walnut, Vanilla and chocolate all work well)
Pour the hot shake into a bowl.
Add 2 heaped dessertpoons of PH on top of the liquid and using either a fork or a balloon whisk, stir briskly.
At first it will seem lumpy but keep at it and it becomes smooth.
Leave it for about a minute to settle. I like to add a little cinnamon powder to mine for extra flavour. Then eat and enjoy!
We call it 'porrige' but the consistancy will be more like thick semolina. Just so you know you've got it right.