In a high-speed blender, combine the egg whites, Greek yogurt, vanilla protein powder, rolled oats, baking powder, cinnamon, and sea salt.
Pulse until the mixture is completely smooth and the oats are fully incorporated into a thick batter.
Slice the medium banana into 1/4-inch thick rounds.
Heat a large non-stick skillet over medium-low heat and add the ghee, swirling to coat the surface.
Place the banana slices in the skillet in small clusters of three or four slices per pancake and cook for one minute until they begin to soften.
Pour the pancake batter directly over each cluster of banana slices, using about 1/4 cup of batter per pancake.
Cook for two to three minutes until bubbles form on the surface, then carefully flip to sear the banana side until golden and fragrant.
Serve the pancakes stacked high and finish with a light drizzle of pure maple syrup.