Add 1 desert spoon of cornflour to 2 tablespoons of lemon juice and stir until smooth
Heat cherries in pan until the liquid is bubbling
Add lemon and cornflour mixture
Stir constantly until the liquid turns from white to opaque and starts to thicken
Take of heat as soon as it starts to thicken
Refrigerate until cool
Pour the cherry mixture onto the cheesecake and refrigerate for 4-5 hours or overnight