In a blender, combine the liquid egg whites, egg, nonfat plain Greek yogurt, oat flour, ground cinnamon, sea salt, and vanilla extract until completely smooth.
Slice the banana into 1/4-inch thick rounds.
Heat a large non-stick skillet over medium heat and melt 0.5 tsp of the ghee.
Place the banana slices in the skillet and cook for 1-2 minutes per side until they develop a deep golden-brown crust.
Remove the caramelized bananas from the pan and set them aside on a plate.
Wipe the skillet clean, melt the remaining 0.5 tsp of ghee, and pour the batter into the pan to form 3 or 4 medium-sized pancakes.
Cook until bubbles form on the surface and the edges are set, then flip and cook for another 2 minutes until golden.
Stack the pancakes on a plate, top with the warm caramelized bananas, and serve immediately.