Pulse the rolled oats in a high-speed blender until they reach a fine, flour-like consistency.
Add the egg whites, Greek yogurt, half of the banana, hemp seeds, cinnamon, vanilla, baking powder, and sea salt to the blender and process until the batter is completely smooth.
Slice the remaining half of the banana into thin, even rounds.
Heat a large non-stick skillet over medium-low heat and melt the ghee, swirling to coat the entire surface.
Pour the batter into the skillet to form three pancakes, then gently press the banana slices into the wet tops of each one.
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 until the bananas are deeply golden and caramelized.
Transfer to a plate and serve immediately while the fruit is warm and fragrant.