Boil the apples in a pressure cooker with little water and make a puree
Sieve oats, flour,cocoa powder and baking powder and keep aside
Mix yogurt,apple puree , vanilla essence and powdered sugar well.
Fold in the flour mix and add walnuts.
Pour the mix in a greased tin and sprinkle more walnuts on top.
Bake in a preheated oven at 180 degree Celsius for 25-30 mins till a skewer comes out clean.
Demould when cool and cut into pieces and serve.
