Place the rolled oats in a high-speed blender and pulse until they reach a fine, flour-like consistency.
In a medium bowl, whisk together the oat flour, vanilla protein powder, ground cinnamon, baking powder, and sea salt.
In a separate bowl, mash half of the banana until smooth, then stir in the liquid egg whites, Greek yogurt, and vanilla extract.
Pour the wet ingredients into the dry ingredients and whisk until just combined; let the batter rest for 5 minutes to thicken.
Heat a non-stick skillet over medium-low heat and add half of the ghee to coat the surface.
Pour the batter into the skillet to form 3-4 pancakes and cook until bubbles form on the surface, then flip and cook until golden brown.
Remove the pancakes, add the remaining ghee to the pan, and slice the remaining half of the banana into rounds.
Sear the banana slices for 1-2 minutes per side until they are deeply caramelized and golden, then serve immediately over the pancakes.