Preheat the oven to 180C and line a round baking tin with parchment paper (mine is 20cm in diameter)
In a large bowl, mix the dry ingredients: buckwheat flakes, quinoa, chia, flaxseeds, cinnamon and salt.
Next stir in the banana, sweetener, nut butter, nuts and vanilla extract. Mix well.
Scoop into the baking tin and press down firmly to form cake shape. Cook 15 to 20min or until golden. Allow to cool completely before slicing it.
Spread some nut butter on top and use any fruit of your choice as a topping.