In a high-speed blender, combine the egg whites, Greek yogurt, oat flour, cinnamon, vanilla, and sea salt until the batter is completely smooth.
Peel the banana and slice it into rounds approximately one-quarter inch thick.
Heat a large non-stick skillet over medium heat and melt half of the ghee, swirling to coat the surface.
Place the banana slices in the skillet and sear for 1-2 minutes until deeply caramelized and golden brown, then flip and cook for another 30 seconds before removing them from the pan.
Wipe the skillet clean if necessary, add the remaining ghee, and pour the batter to form three or four medium-sized pancakes.
Cook the pancakes until small bubbles appear on the surface and the edges look set, roughly 3 minutes.
Carefully flip each pancake and cook for an additional 2 minutes until the centers are firm and the outsides are golden.
Plate the pancakes immediately, topping them with the warm caramelized banana slices and a sprinkle of hemp seeds for a nutty crunch.