Place the rolled oats into a high-speed blender and pulse until they reach a fine, flour-like consistency.
Add the egg whites, Greek yogurt, half of the banana, cinnamon, vanilla, baking powder, and sea salt to the blender and process until completely smooth.
Heat the ghee in a large non-stick skillet over medium heat.
Slice the remaining half of the banana into rounds and place them in the skillet, searing for 1-2 minutes per side until deeply golden and caramelized.
Remove the caramelized bananas from the pan and set aside on a plate.
Pour the pancake batter into the same skillet to form three or four small pancakes, cooking until bubbles form on the surface and the edges look set.
Flip the pancakes carefully and cook for another 2 minutes until cooked through and firm to the touch.
Serve the pancakes stacked high and topped with the warm caramelized banana slices.