Preheat oven to 350F, spray a regular sized muffin tin with cooking spray.In a bowl using an electric mixer beat together your egg, egg white and brown sugar. Add in mashed banana, yogurt, lemon juice and vanilla and beat for 1 minute.Stir in baking powder, soda, lemon zest and flour.Gently fold in your frozen blueberries (fresh are ok but use smaller blueberries)Fill 10 muffin cups with your batter and bake in oven for approx 25 minutes.Let cool for 5 minutes.Store in sealed container, best stored in fridge after 1 day.Makes 10 muffins at 2 smart points or 2 points plus each, Nutritional info per muffin (not incl berries or banana) Calories 71... Fat 0.6g...Saturated fat 0.2g... Carbs 12.6g...Fiber 0.3g..Sugars 3.1g...Protein 3.7g