Like most things I make, this recipe started life as a non gluten free recipe I found in a magazine, however after many experiments and changes of ingredients, it has been transformed a gluten free star that's so easy to make. I actually make this for a couple of cafes, and have been told by many that it doesn't taste gluten free. I always add a little xanthan or guar gum to gluten free four blends, even when they already contain some. It makes the texture just that little better. The walnuts and dates are optional, use one or both or leave them out, its entirely up to you. Another hint: buy bananas when they're cheap and keep them in the freezer. Thawed frozen bananas mash so much easier than fresh bananas.