Take sufficient water in a pressure cooker and heat it. In a shallow steel pan, take the milk and add condensed milk and yogurt. Blend well. Add almonds, pistachios and raisins to the milk abd mix well. Cover the pan with cling wrap and seal it all around leaving few slashes on top. Place the pan in the cooker and steam cook it with the lid on for forty minutes.
Take it out of the cooker and allow it to cool. Refrigerate till set. Cut into pieces and serve.