Cheesecake (unbaked)

• 200 g plain biscuits
• 80 g butter, unsalted, softened
• 250 g water
• 90 g jelly dessert powder, sweetened, lemon flavour (for 500 g liquid) (see tip)
• 400 g cream cheese
• 200 g cream
• 40 g sugar (caster sugar)

Jam topping

• 200 g jam (e.g. strawberry, raspberry, plum)
• 2 tbsp lemon juice
• 1 - 2 tsp unflavoured gelatine powder (5 g) (see tip)
• 50 g water