Preheat oven to 375 degrees. Line two muffin pans with paper or foil liners.
In a large bowl, combine the flour, oats, baking powder, baking soda, cinnamon, salt and nutmeg.
In a medium bowl, whisk the eggs, then add in the coconut oil, Greek yogurt, honey and vanilla. Stir in the mashed bananas.
Add the wet ingredients into the dry, using a flexible spatula to fold ingredients together until no lumps of flour remain. Carefully fold in the blueberries as well.
Fill each muffin cup ¾ of the way full.
Bake for 20-22 minutes or until a toothpick inserted in the center comes out clean.
Transfer to a wire rack and let muffins cool completely.