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!
NOTE:
We call it 'porrige' but the consistancy will be more like thick semolina. Just so you know you've got it right.