Place apples on a paper towel and squeeze out some of the excess moisture.
Spoon flours into dry measuring cups and level with a knife. Add to medium bowl. Add oats, brown sugar, baking powder, baking soda, salt, and cinnamon. Whisk to combine. Make a well in the center.
In another bowl, combine milk, oil, vanilla, yogurt and egg. Whisk.
Add egg mixture to flour mixture, stirring just to combine. Stir in apples.
Fill muffin pan with liners or spray with cooking spray. Spoon batter in to 12 muffin cups.
Bake for 20 minutes or until they spring back when touched lightly in the center.
Remove from baking pan and cool on wire rack.
Notes
Note - this recipe has been tested with both low fat and full fat dairy. Both work. If you want lower calories, use the lower fat v