Passion Fruit Cheesecake Slices

Ingredients

• For the filling:
• 250g digestive biscuits, finely crushed
• 125g butter, melted
• 175g cream cheese, at room temperature
• 250g ricotta cheese, at room temperature
• 125g caster sugar
• 3 eggs
• 1 level tbsp cornflour
• 1 lime, zest finely grated and juice reserved
• 150ml sour cream
• 175ml passion fruit pulp, approx 5 large passion fruit
• Icing sugar to decorate
• You will need:
• a 20x30cm rectangular tin, lightly greased and lined with baking parchment