Preheat the oven to 350 F. Lightly grease a muffin tin with extra virgin olive oil.
In a bowl, whisk together the eggs with the applesauce, milk and vanilla extract until smooth.
In a separate bowl, combine the flax, protein powder, oats and salt.
Add the liquid to the oat mixture to combine until all the oats are covered. The mixture should be wet and heavy. If the mixture is very dry, this may be due to the protein powder you are using. Add more milk as needed. Fold the blueberries into the the batter carefully.
Transfer the batter to the prepared muffin tins filling each cavity about 3/4 of the way full.
Bake at 350 F 20 minutes or until the top of the muffins look slightly brown. Remove from the oven and cool a few minutes before removing the muffins and transferring to a wire baking rack to cool.
Notes
Don’t over mix the batter, or the muffins will turn out dense and gummy.
Only use fresh berries and fruit because frozen fruit releases too much moisture.
If the batter seems dry, add another splash of milk. Some protein powders absorb more moisture than others.
I used a protein powder that is stevia sweetened so the muffins are already sweet without adding sweetener. If you don't use a protein powder with added sweetener, I recommend you add a zero calorie sweetener like Truvia, monkfruit, stevia, etc. to give the muffins a touch of sweetness.