Place liners in a muffin tin. Set aside.
In a small bowl mix together the rolled oats and buttermilk. Let stand 10 minutes.
Preheat oven to 400F.
Add the egg and melted butter to the oat mixture and mix well.
In a large mixing bowl, combine the flour, baking powder, baking soda, salt and sugar.
Add the oat mixture to the dry ingredients and stir until all ingredients are combined.
Gently fold in the blueberries.
Spoon the batter into the prepared muffin tin filling the cups ¾ full.
Bake for 20 - 25 minutes.
Cool on a wire rack.