In a large mixing bowl, combine oat flour, maple syrup, egg, and egg whites. Mix until smooth, adjusting the consistency with milk as needed; the batter should be pourable but not too thin. Allow to rest for a few minutes.

Heat a non-stick skillet over medium heat, lightly greasing it. Pour approximately 1/4 cup of batter into the skillet, swirling to create a thin layer. Cook for 1-2 minutes until the edges lift and the bottom is golden, then flip and cook for another 1-2 minutes.

In a separate bowl, mix Greek yogurt, your chosen sweetener, and ground cinnamon until creamy. Set aside to let flavors meld.

Once the crepes are cooked, spoon a generous amount of the filling onto one side of the crepe. Fold over or roll up, then repeat with remaining crepes and filling.

Plate the assembled crepes. For an extra treat, sprinkle with cinnamon and sweetener or drizzle with maple syrup. Enjoy warm.