Transfer the oats, protein powder, baking powder, cinnamon, nutmeg, and sea salt (all of the dry ingredients) to a high-speed blender. Blend on a low speed for 60 seconds or until the oats have blended into a flour.
Add all of the wet ingredients to the blender (eggs, egg whites, milk, avocado oil, and pure maple syrup), and blend until everything is well combined.
If the batter seems too thin, allow it to sit for 15 minutes to thicken. I like to peel and chop the apple during this time.
Heat a large non-stick skillet over medium heat and spray with non-stick cooking spray. Allow the skillet to heat up for several minutes.
Measure out ¼ cup of batter. Sprinkle some of the chopped apples on top of the batter. Once many small bubbles have risen to the top of the batter after about 2-3 minutes, flip the pancake and continue cooking until cooked through and golden brown on both sides, about another 1-2 minutes.
Repeat for the remaining batter and chopped apple.
Serve apple pancakes with your choice of toppings and enjoy!
I like butter and honey on top of mine, but pure maple syrup and almond butter or peanut butter is lovely too.
Store leftover pancakes in an airtight container in the refrigerator for up to 5 days. Freeze pancakes in a freezer bag for up to 3 months.