Preheat oven to 400 and grease a 12 cup muffin pan. Set aside.
In a small bowl, combine flour and baking soda and mix well. Set aside.
In a large bowl, mash banana and add egg, milk, oil and sugar and mix well.
Stir in dry flour mixture just until combined.
Fold in blueberries.
Use a 3 tablespoon portion scoop to divide batter equally in 12 muffin cups. Sprinkle tops with sparkling sugar if desired.
Bake for 15-18 minutes or until toothpick inserted in the center comes out clean. Let cool for 10 minutes before removing from pan and cooling completely before serving.