Preheat oven to 400°F Line a 12 cup muffin pan with paper liners.
Place oats in a food processor or blender. Process until oats are finely ground.
Combine fine ground oats, fliour, brown sugar, baking powder, cinnamon and baking soda in a large bowl. In a separate bowl, whisk yogurt, egg whites and canola oil,. Stir liquid ingredients into dry ingredients, until almost blended. Gently stir grated apple into batter until evenly mixed.
Spoon batter into prepared muffin pan.
Bake in a preheated oven for 18-20 minutes or until a toothpick inserted in center of muffin comes out clean,.
TIPS: For a time saver, process extra oats, and store in an airtight container in the freezer so you can have them on hand.