In a large mixing bowl, whisk together the nonfat Greek yogurt, whole egg, egg whites, and vanilla extract until the mixture is smooth and aerated.
Add the oat flour, baking powder, and sea salt to the wet ingredients, stirring gently until just combined.
Allow the batter to rest for 5 minutes; this allows the oat flour to hydrate, resulting in a fluffier texture.
Heat a large non-stick skillet or griddle over medium-low heat and lightly coat the surface with the ghee.
Ladle approximately 1/4 cup of batter per pancake onto the hot skillet, leaving space between each.
Press several fresh blueberries into the top of each pancake while the batter is still wet.
Cook for 3 to 4 minutes until small bubbles form on the surface and the edges appear set.
Carefully flip the pancakes and cook for an additional 2 minutes until the other side is golden brown and the center is cooked through.
Serve immediately while warm, topped with any remaining fresh blueberries.