Place the rolled oats in a high-speed blender and pulse until they reach a fine, flour-like consistency.
In a large mixing bowl, whisk together the egg whites, Greek yogurt, vanilla extract, and half of the banana (thoroughly mashed) until the mixture is light and aerated.
Gently fold the oat flour, cinnamon, sea salt, and baking powder into the wet ingredients until just combined, being careful not to overmix.
Heat a large non-stick griddle or skillet over medium heat and lightly grease with half of the ghee.
Pour the batter onto the skillet in 1/4 cup increments and cook for 2-3 minutes until small bubbles appear on the surface and the edges are firm.
Flip the pancakes and cook for an additional 1-2 minutes until both sides are a beautiful golden brown.
While the pancakes finish, heat a separate small skillet over medium heat with the remaining ghee.
Add the remaining half of the banana (sliced into rounds) and the pecans to the small skillet, sautéing for 2-3 minutes until the bananas are caramelized and the pecans are fragrant.
Stack the pancakes on a plate and top with the warm caramelized banana and toasted pecan mixture.