Pre-heat the oven to 180 degrees Celsius. Grease and line a 2 lb loaf tin.

In a small bowl add mix the ground flaxseeds with the water and leave to sit for 5 minutes. Mix the mashed banana with the maple syrup, vanilla extract, melted butter and milk and add the ground flaxseed mixture.

Sift the flour, baking powder and bicarbonate of soda together in a separate bowl. Add to the wet banana mixture and mix to combine.

Stir in half of the chopped walnuts.

Place the mixture in a lined 2 lb loaf tin. Sprinkle the other half of the chopped walnuts on top. 

Place in the oven and bake for 60 minutes or until cooked through – test with a skewer or knife and if it comes out clean it is done. If you notice the top starting to brown too much or the walnut topping burning you can loosely cover it with foil when it’s baking.

Leave to cool in the tin for 10 minutes before turning out on a wire rack to cool completely.