Preheat oven to 350F, spray a regular size loaf pan.In a large bowl mix your flour and baking soda together.In a separate bowl, using an electric mixer beat together your sugar, margarine and applesauce. Add in your egg, egg whites, mashed banana and vanilla and beat for a few minutes.Pour your banana mixture into your flour and stir well.Melt your nutella in the microwave for 60 seconds, 20 second intervals stirring each time.Pour half of your loaf batter into your pan, then drizzle with ½ of your nutella, top with remaining batter and drizzle with remaining nutella.Bake in oven for 40-45 minutes.Let cool and cut into 10 slices, each slice is 6sp or 4pp. Best stored in fridge.Nutritional info, not including bananas. Per slice.. Calories 173... Fat 4.4g... Saturated fat 1.2g... Carbs 28.4g... Fiber 1.2g... Sugars 10.7g... Protein 3.8g