In a high-speed blender, combine the egg whites, Greek yogurt, almond flour, coconut flour, half of the banana, cinnamon, vanilla, baking powder, and sea salt.
Blend on high for 30 seconds until the batter is completely smooth and slightly aerated.
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 three or four small pancakes, leaving space between them.
Cook for 3-4 minutes until small bubbles appear on the surface and the edges look set.
Carefully flip the pancakes and cook for another 2 minutes until the bottoms are golden brown.
While the pancakes finish, slice the remaining half of the banana into thin rounds.
Remove the pancakes from the pan and set aside; add the remaining ghee and the banana slices to the hot skillet.
Sear the banana slices for 1 minute per side until they are caramelized and fragrant.
Stack the pancakes on a plate and top with the warm caramelized banana slices.