Preheat the oven to 350 °F (180 °C) and line a muffin tin with paper liners.
In a large bowl, mix together the flour, oats, baking powder, and baking soda.
In another bowl, add the yogurt, coconut oil, egg, mashed banana, honey, and vanilla and mix well.
Add the wet ingredients to the dry ingredients and fold until just combined. Then fold in the juice and zest of the clementine and the blueberries.
Use a scoop to divide the mixture between the muffin wells. Top with extra oats for garnish.
Bake in the oven for 25 minutes until golden brown on the outside and cooked through. Let cool for 5 to 10 minutes.
Serve the muffins with juice.