Pre-heat oven to 200C / Fan 180C
Line muffin tray with paper cases.
Sieve flour into a large bowl, add the bicarbonate of soda then stir in the porridge oats, sugar and blueberries.
In a separate bowl, first mash up the banana then whisk in the egg, vegetable oil and yogurt.
Fold these wet ingredients carefully into the dry ingredients you don’t want to make the mixture too dense.
Divide the mixture equally between the paper cases.
Bake in the centre of the oven for approximately 15 – 18 minutes. Insert a skewer (which should come out clean) to check they are cooked.
Allow to cool a little in the muffin tray before removing and allowing to cool completely on a wire rack.
Once cooled completely, store in an air tight sealed container.