In a large bowl mix oats, flour, flaxseed, sugar, baking powder, baking soda and cinnamon. in a medium bowl mix bananas, milk, egg whites, applesauce and vanilla. Pour liquid mixture into flour mixture and stir to combine. Fold in blueberries
Spoon into muffin cups, filling them about 3/4 full. Bake 22 minutes, until golden brown. Let cool 5 minutes, then remove from cups to continue cooling.