In a high-speed blender, combine the egg whites, egg, rolled oats, Greek yogurt, half of the banana, cinnamon, vanilla, baking powder, and sea salt.
Blend on high until the mixture is completely smooth and the oats have transformed into a fine flour consistency.
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 pan thoroughly.
Pour the batter into the skillet to form three medium-sized pancakes, leaving space between them.
Press the banana slices gently into the wet top of each pancake.
Cook for 3 to 4 minutes until the edges are firm and small bubbles appear, then carefully flip.
Continue cooking for 2 minutes until the banana slices are beautifully caramelized and the pancakes are cooked through.
Serve the pancakes stacked high with an extra dollop of Greek yogurt if desired.