In a medium mixing bowl, mash half of the banana until smooth, then whisk in the egg whites, Greek yogurt, and vanilla extract.
Add the vanilla protein powder, oat flour, cinnamon, and sea salt to the wet ingredients, stirring until just combined into a thick batter.
Heat a non-stick skillet over medium-low heat and lightly grease with half of the ghee.
Pour the batter into the skillet to form three medium pancakes, cooking for 3-4 minutes until bubbles form on the surface.
Flip the pancakes carefully and cook for another 2 minutes until the centers are set and the outsides are golden brown.
While the pancakes finish, slice the remaining half of the banana into thin rounds.
Remove pancakes from the pan, add the remaining ghee, and sauté the banana slices for 1 minute per side until they become caramelized and fragrant.
Stack the pancakes on a plate and top with the warm caramelized banana slices.