Preheat oven to 175C and grease a mini muffin tray
Add the oat flour, cinnamon and baking powder to a bowl and stir to mix.
Add the mashed banana, yoghurt, eggs, vanilla and lemon zest to a large mixing bowl. Stir until combined.
Slowly add the dry ingredients and gently stir until just combined.
Add the majority of blueberries, reserving some for the top, and gently stir again.
Fill each muffin cup and top with a blueberry.
Bake for 20-25 mins, remove and allow to sit for 5 mins before transferring to a wire rack to cool fully.
