Preheat oven to 350 F. Spray or use paper liners on 12 muffin cups. Set the pan aside.
In a small bowl, prepare the chia egg by mixing 1 Tbsp. of ground chia seeds with 3 Tbsp. warm water. Stir to mix and set aside to thicken.
In a blender or food processor, place the 3 cups of oats. Blend on high until the mixture turns into course flour like consistency.
In a large bowl, mix the oat-flour mixture, Craisins, sugar, baking powder, salt and baking soda.
Add the olive oil, orange juice, apple cider vinegar and chia egg to the dry ingredients and mix just until the ingredients are incorporated.
Fill each muffin cup 2/3 full of batter.
Bake for 18 -20 minutes.