In a high-speed blender, combine the rolled oats, egg whites, Greek yogurt, half of the banana, hemp seeds, cinnamon, vanilla, baking powder, and sea salt.
Pulse until the batter is completely smooth and the oats are finely ground.
Slice the remaining half of the banana into thin rounds.
Heat the coconut oil in a large non-stick skillet over medium heat.
Pour the batter into the skillet to form three or four small pancakes.
Press the banana slices into the wet side of each pancake before the batter sets.
Cook for 3 minutes until bubbles form on the surface, then flip carefully.
Cook for another 2 minutes until the banana slices are caramelized and the pancakes are firm to the touch.
Serve warm as is or with a dollop of extra yogurt.