Juice of 1 lemon
15 ml/1 tbsp arrowroot
Caster (superfine) sugar
Make the fruit rind and juices up to 300
ml with water. Blend a little with the arrowroot in a saucepan, then
stir in the remainder. Bring to the boil, stirring all the time, until
thickened and clear. Sweeten to taste with caster sugar. Serve hot.