Place the egg whites, Greek yogurt, rolled oats, protein powder, half of the banana, cinnamon, baking powder, and sea salt into a high-speed blender.
Process on high until the batter is completely smooth and creamy, then let the mixture rest for 2 minutes to allow the oats to hydrate.
While the batter rests, slice the remaining half of the banana into thin, even rounds.
Heat a large non-stick skillet over medium-low heat and add the ghee, swirling to coat the surface.
Pour the batter into the skillet to form 3 or 4 small pancakes, then gently press the banana slices into the wet top of each pancake.
Cook for 3 to 4 minutes until bubbles form on the surface and the edges look set.
Carefully flip the pancakes and cook for another 2 minutes, allowing the banana slices to caramelize against the hot pan until they are golden and fragrant.
Serve immediately while warm and tender.