85g/3oz apple, peeled, cored and diced
85g/3oz rhubarb, cut into 1cm/陆in pieces
55g/1oz oat bran
250g/9oz plain flour, sifted
1 tbsp baking powder
200g/7oz soft brown sugar
录 tsp ground cinnamon
1 tbsp demerara sugar
录 tsp ground nutmeg
6 tbsp sunflower oil
1陆 tsp vanilla extract
55g/2oz walnuts, chopped
250ml/9fl oz buttermilk
1 free-range egg, beaten