Preheat oven to 400°F. Lightly grease a 12-cup muffin pan.
Hard boil 4 eggs. Set aside and allow to cool.
In a small bowl, mix the oats and orange juice together; set aside.
In a medium bowl, mix flours, sugar, baking powder, salt, and baking soda. Add in gently melted coconut oil, vanilla, and remaining egg, and stir until well combined.
Add the oat mixture to the batter, then fold in the blueberries. Spoon batter into the prepared muffin cups.
Mix 2 teaspoons sugar and cinnamon in a small bowl, then sprinkle evenly over the tops of the muffins.
Bake 18-20 minutes or until a knife inserted in the center of a muffin comes out clean.
Allow to cool before serving; serve hard boiled eggs on the side.