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, cinnamon, sea salt, and vanilla extract to the blender.
Blend the mixture on high until the batter is completely smooth and well combined.
Heat a large non-stick skillet over medium-low heat and melt half of the ghee to coat the surface.
Pour the batter into the skillet to form small pancakes and cook until bubbles form on the surface, then flip and cook until golden.
Slice the remaining half of the banana into thin rounds while the pancakes finish cooking.
Remove the pancakes, melt the remaining ghee in the skillet, and sauté the banana slices for one minute per side until caramelized.
Serve the pancakes stacked high and topped with the warm, golden banana slices.