In a medium mixing bowl, whisk together the non-fat Greek yogurt, liquid egg whites, and vanilla extract until the mixture is completely smooth.
Add the vanilla protein powder, oat flour, ground cinnamon, baking powder, and sea salt to the wet ingredients, stirring gently until just combined.
Slice the half banana into thin rounds and set aside.
Heat a large non-stick skillet over medium-low heat and melt the ghee, ensuring it coats the bottom of the pan evenly.
Place the banana slices onto the skillet in small clusters where you intend to pour the pancakes.
Allow the bananas to sear for about 60 seconds until they begin to soften and caramelize.
Pour the pancake batter directly over each cluster of banana slices to form 3 to 4 small pancakes.
Cook for 3-4 minutes until bubbles appear on the surface and the edges look set, then carefully flip.
Cook for an additional 2 minutes on the second side until the pancakes are golden and the bananas are deeply caramelized.
Remove from the heat and serve immediately while warm.