Makes 12 muffins
Preheat the oven to 200°C
Combine the flour, oats sugar, baking powder and cinnamon.
In a large bowl beat the egg lightly, and stir in the milk. Add the mashed banana and combine thoroughly.
Stir in the flour mixture into the banana mixture until combined.
Divide the mixture between 12 muffin cases and bake for 20 minutes until golden.