Preheat oven to 350 degrees. Lightly spray a loaf pan with EVOO spray.
In a medium bowl, whisk the wet ingredients until well combined.
In a separate large bowl, sift the dry ingredients together. Add the wet ingredients to the dry ingredients and stir with a wood spoon until just combined. Do not over mix.
Fold in walnuts and/or chocolate if using. Pour mixture into muffin pan and bake for 15-20 minutes or when an inserted toothpick comes out clean.