Pulse the rolled oats in a high-speed blender until they reach a fine, flour-like consistency.
Add the liquid egg whites, Greek yogurt, cinnamon, vanilla extract, baking powder, and sea salt to the blender.
Process the mixture on medium speed until the batter is completely smooth and well-combined.
Slice the half banana into thin rounds.
Heat the coconut oil in a large non-stick skillet over medium heat.
Place the banana slices in the skillet and cook for 1 minute per side until they are golden and caramelized, then remove them from the pan.
Pour the pancake batter into the same skillet to form three medium pancakes.
Cook for 2-3 minutes until bubbles form on the surface, then flip and cook for another 2 minutes until the centers are firm.
Plate the pancakes and top them with the caramelized banana slices and a drizzle of maple syrup.