Place the egg whites, Greek yogurt, rolled oats, protein powder, half of the banana, cinnamon, sea salt, and vanilla extract into a high-speed blender.
Blend on high until the mixture is completely smooth, then allow the batter to sit for 3 minutes to thicken to a pancake consistency.
Heat a large non-stick skillet over medium-low heat and melt half of the ghee to lightly coat the surface.
Pour the batter into the skillet to form 3 or 4 small pancakes, cooking until small bubbles appear on the surface and the edges look set.
Carefully flip the pancakes and cook for another 1-2 minutes until they are golden brown and cooked through.
While the pancakes finish, slice the remaining half of the banana into thin rounds.
Remove the pancakes from the pan, add the remaining ghee and the maple syrup, then sauté the banana slices until they are caramelized and soft.
Serve the warm pancakes stacked high and topped with the caramelized bananas and any remaining syrup from the pan.