Preheat oven to 400°
Prepare a muffin tin either by greasing the cups or lining them with paper cups and spraying with cooking spray.
In a large bowl mix together the flour, oats, cinnamon, baking power, baking soda and salt. Mix well.
Add the apple pieces (and raisins if using) and toss to coat.
In a medium bowl mix together the buttermilk, canola oil, orange juice concentrate, maple syrup, brown sugar and egg.
Stir well until the sugar dissolves.
Add the wet ingredients to the dry ingredients and fold together until just combined. Don't over mix.
my muffin tins are O.L.D. but they bake so well
Using a large scoop or spoon add the batter to the prepared muffin tin.
Sprinkle the top with the sugar in the raw.
Bake in the preheated oven for 20 - 22 minutes until a toothpick comes out clean.
Remove and let cool on a wire rack.