Place the ProZero, butter and cornflour into a saucepan
Heat gently and stir with a whisk until the mixture starts to simmer and thicken.
Remove from the heat and pour into a tall plastic container and using an electric hand-held blender, blend for 30-40 seconds.
Cover and leave until cool, stirring occasionally. Once cooled, place in the fridge until chilled.
After chilling, stir in the lemon juice and chives and season to taste.
Try serving with baked sweet potato and permitted vegetables as a main or with permitted crudités and Mini Crackers as a snack.
Add finely chopped spring onions or crushed garlic instead of chives for a stronger taste.
ProZero is a food for special medical purposes and must only be used under strict medical supervision.