Preheat the oven to 350℉
Grind the oats into a flour consistency, add them and the other oats and dry ingredients to a bowl and stir together
Whisk eggs (whites and whole eggs) together into a separate mixing bowl. Add the wet ingredients to the eggs and mix well
Slowly mix the dry ingredients into the wet ingredients and allow batter to come together.
Allow batter to sit in bowl for 10 minutes. While sitting, dice apples (use a corer if you would like).
Place parchment paper muffin wrappers into the muffin tray.
After the 10 minutes fold in ¾ of the apples into the batter, spoon in the batter until about ¾ of the wrapper is full. Sprinkle (or push) the remaining apples into the top of muffin to add to the visual effect.
Bake for about 22 minutes, check at 20... time will vary a little depending on location and oven, however, I usually do 22-23 minutes
This batch makes 18-20 muffins and as there is no butter or oil... I use parchment paper muffin liners, and they work like a charm. Putting batter into another liner or any metal liner might create sticking... even if greased. These are done when they are able to have a fork or toothpick come out clean... old trick but it works!