Preheat the oven to 180C. Lightly grease a loaf tin with canola cooking spray.
Place the flours, cinnamon, sugar, egg, water, bananas and soy milk in a food processor and blend until smooth.
Fold the walnut pieces and dates into the mixture and pour into the prepared loaf tin.Bake for 1 hour, or until a skewer comes out clean when inserted into the centre. Allow to cool slightly in the tin before turning out onto a wire rack.