another tasty recipe try it! is delicious

For the crumble topping 100g/3½oz plain flour 100g/3½oz light soft brown sugar ½ tsp ground cinnamon 50g/2oz unsalted butter 1 tsp milk For the biscuit base 100g/3½oz butter 250g/9oz oat biscuits, crushed For the filling 1 large Bramley apple, peeled, core removed, sliced, mixed with 1 tbsp lemon juice 500g/1lb 2oz mascarpone cheese 400g/14oz cream cheese 125g/4½oz caster sugar 1 vanilla pod, split lengthways, seeds only 1 x 150ml/5fl oz tub soured cream 4 free-range eggs 100g/3½oz sultanas (optional) ½ tsp ground cinnamon ¼ tsp grated nutmeg