Preheat oven to 350F, spray a 12 hole regular muffin tin with cooking spray (do not use liners)
In a bowl whisk together your egg, egg whites and brown sugar.
Stir in your apple sauce, milk and vanilla.
Mix in your flour, baking powder and soda.
Dice your strawberries and rhubarb up into small pieces, in a bowl mix them with 1 Tbsp flour, this will help with them not all sinking to the bottom of the muffins. Fold into your batter and divide over your 12 muffin cups.
In a small bowl combine your 1.5 Tbsp brown sugar and 1 Tbsp flour, add your cold margarine and blend with a fork, it will form a crumble like topping, sprinkle over your 12 muffins.
Bake in oven for 25 minutes.
Muffins best stored in fridge, makes 12 muffins at 3 smart points each (2 points plus) you can leave the brown sugar topping off if you'd prefer, the points will stay the same though.
Nutritional info per muffin, incl strawberries & rhubarb.. Calories 85... Fat 1.4g.. Sat fat 0.3g .. Carbs 14.8g.. Fiber 0.7g... Sugars 4.6g...Protein 2.9g..