1. Measure the caster sugar into a stainless steel pan, add 300ml of water and the lemon Juice.
2. Mix 75g of the corn flour with a further 200ml of cold water until smooth and stir into the sugar mixture. Sprinkle the gelatin over and slowly bring it to the boil, over a medium heat simmer briskly for 20 minutes.
|20 minutes of simmering makes the mixture thicken up!|