Raspberry Ripple Cheesecake

If using gelatine leaves, soak them in 150ml (5fl oz) water for 5 minutes, then remove, squeezing out excess water, and place in a bowl over a pan of simmering water for about 30 seconds, stirring until melted. Set aside to cool. If using powdered gelatine, put 3 tablespoons water into a small saucepan, sprinkle over the gelatine and leave to stand for 5 minutes. Put the pan over a low heat and stir gently for 1 minute until the gelatine has dissolved. Set aside to cool.

Melt the butter in a large pan and stir in the crushed biscuits. Spread the mixture over the base of a 20cm (8in) round cake tin, pressing it down, then place in the fridge.

Blitz the raspberries together with the icing sugar in a food processor, then press through a sieve into a small pan to get rid of any seeds. Remove 1 tablespoon of the raspberry coulis and mix with the cornflour. Stir this into the raspberry coulis in the pan, bring to the boil, then allow to cool.

Beat together the cream cheese, sugar and vanilla until smooth. Remove 6 tablespoons and stir into the gelatine. Beat the cream until stiff. Fold the cream into the cream cheese mixture, together with the cream cheese and gelatine mixture.

Remove the cake tin from the fridge and spread half the cheesecake mixture over the base. Spoon half the raspberry coulis in blobs onto the cheesecake mix, then, using a skewer, swirl it through to make a ripple effect. Spoon the remaining cheesecake mixture on top and level the surface with a palette knife. Decorate the top of the cake by trailing lines of raspberry coulis from a teaspoon. Use a skewer to draw vertical lines through the coulis to create a pattern. Place in the fridge to set. Once set, arrange the berries on top. Melt the chocolate in a heatproof bowl over a pan of simmering water, then pour into a piping bag and pipe zig-zag lines of chocolate over the fruit.