In a large mixing bowl, whisk together the Greek yogurt, egg, egg whites, and vanilla extract until the mixture is smooth and well combined.
Sift in the oat flour, baking powder, and sea salt, then fold gently with a spatula until just incorporated to ensure the pancakes remain light.
Heat the coconut oil in a large non-stick skillet over medium-low heat until shimmering.
Pour approximately 0.25 cup of batter for each pancake onto the skillet, leaving space between them.
Cook for 3 to 4 minutes until small bubbles appear on the surface and the edges look set.
Carefully flip the pancakes and cook for an additional 2 minutes until they are golden brown and springy to the touch.
Transfer the pancakes to a plate and garnish with fresh blueberries and a drizzle of pure maple syrup.