Place the rolled oats into a high-speed blender and pulse until they reach a fine, flour-like consistency.
Add the egg whites, protein powder, 0.25 cup of the Greek yogurt, baking powder, cinnamon, and sea salt to the blender; process until the batter is completely smooth.
Peel the banana and slice it into thin, uniform rounds.
Heat the ghee in a large non-stick skillet over medium-low heat until melted and shimmering.
Pour the batter into the skillet to form three to four small pancakes, leaving space between each.
Press several banana slices into the wet surface of each pancake before the batter sets.
Cook for approximately 3 minutes until small bubbles form on the surface, then carefully flip the pancakes so the banana side is face down.
Cook for another 2 minutes, allowing the natural sugars in the bananas to caramelize against the pan until golden brown.
Transfer the pancakes to a plate and serve immediately with the remaining 0.25 cup of Greek yogurt on top.