In a high-speed blender, combine the egg whites, vanilla protein powder, oat flour, almond milk, vanilla extract, cinnamon, and sea salt.
Blend on high for 30 seconds until the batter is completely smooth and a few bubbles form on the surface.
Heat a 10-inch non-stick skillet over medium-low heat and lightly brush the surface with coconut oil to prevent sticking.
Pour approximately 1/4 cup of the batter into the center of the hot pan, immediately tilting and rotating the skillet to spread the batter into a thin, wide circle.
Cook for 90 seconds until the edges start to crisp and pull away from the pan, then gently slide a spatula underneath to flip.
Cook the second side for just 30-45 seconds until set, then transfer to a plate and repeat with the remaining batter.
In a small bowl, whisk the Greek yogurt until it reaches a smooth, spreadable consistency.
Spread two tablespoons of yogurt down the center of each crepe, fold or roll tightly, and garnish with a generous cup of fresh mixed berries.