In a medium sized bowl, mash the banana and mix in the egg. Mix in the rest of the ingredients, gently stirring in the blueberries at the end.
Lightly grease muffin tins or line with muffin liners. Make 6 muffins, filling the tins almost to the top with batter.
Bake for 18-20 minutes, or until lightly browned.
Allow them to cool for 5-10 minutes after removing from the oven.
When the muffins are completely cool, they can be stored in an airtight container for a few days, or frozen.
To make this breakfast gluten-free, be sure to use certified gluten-free oats. Oats are a naturally gluten-free grain, but are often processed with products containing gluten and this contamination can be enough to trigger an immune response in those with high gluten sensitivity or celiac disease.
The serving size for this recipe is 2 muffins for a lighter breakfast, or 3 muffins for a more filling breakfast.