Preheat oven at 170 degrees Celsius
Prepare muffin baking tin by inserting muffin patties or coating pan with butter or extra virgin olive oil
In a large mixing bowl, mash bananas with a fork
Add Greek yoghurt and extra virgin olive oil to bowl and whisk
Add coconut sugar and whisk until combined
Add buckwheat flour, gluten free self raising flour, baking powder and bi-carb soda and whisk until well combined
Stir in blueberries into the batter
With a spoon, add the batter into the muffin tray holes up to about half full
Pop into oven and bake for 20 minutes
Serve cooled with a dollop of cream or slather of butter