Preheat you oven to 350℉ and line a muffin tin with 12 liners. Set aside.
In your blender, combine everything except apples. Blend until you have a smooth batter and everything is incorporated. If you don not have a high-speed blender. Blend dry ingredients first until oats are broken down to a flour-like consistency. Then add remaining ingredients (except) and blend again. This will help to break down oats easier and give your muffin a better texture.
Fold in finely chopped apples.
Portion out between the prepared muffin cups. Top with a few thin slices of apple if you like for decoration.
Bake for 20-25 minutes.
Allow muffins to cool for 20 minutes before enjoying.
Allow muffins to cool completely before storing in an air-tight container in the fridge for up to 5 days or in a freezer for up to a month.
