Blend the soaked dates to a paste, add roughly mashed bananas. Give it a whizz, now add sugar, oil and vanilla, blend them into a paste. Add flour and soda to the paste and stir the mixture until well incorporated. Grease and line a baking loaf. Pour the batter, scatter walnuts and bake them for about 25 minutes or until done in a preheated oven of 180 "C.