Preheat oven to 160 degrees Celcius on fanbake.
Mix together the mashed bananas, eggs, oil and yoghurt in a large bowl. I like to use a stick blender to get it smooth, but you can just whisk it if you don’t have one.
Add the flours, chia seeds, baking powder, cinnamon and sugar and fold into the wet ingredients. Fold through the 1 cup blueberries.
Place into a lined, greased loaf tin. Top with the remaining blueberries.
Cook for 50-60 minutes, or until a skewer comes out clean when inserted to the middle.