If starting with rolled oats measure and put into blender or food processor to make into a fine powder/flour. (I used my vitamix on high for about 30 seconds)
In a large bowl, whisk the dry ingredients: oat flour, baking powder, salt and cinnamon.
In another bowl, whisk together the wet ingredients: milk, eggs, olive oil, maple syrup and vanilla extract.
Pour the wet ingredients into the dry ingredients and mix until just combined.
Allow the batter rest for 15 minutes to allow the oats to absorb some of the water. While waiting you can plug in your waffle maker in to preheat.
Pour batter onto the heated waffle maker and follow manufacturer instructions on making the waffle.
Repeat until batter is gone and serve with butter, maple syrup or other fruit preserves!