Heat the waffle iron. In a large bowl, whisk together the flour, polenta, sugar, baking powder, baking soda, cinnamon, and salt. In a separate bowl whisk or beat the egg whites until soft peaks form.

Form a well in the dry ingredients and add the egg yolks, buttermilk, milk, vanilla, and oil. Whisk the wet ingredients into the dry, being careful not to overmix. A few lumps are fine. With a large rubber spatula, gently fold the whites into the mixture just until to combined to maintain the airy texture. Ladle the mixture onto the preheated, sprayed waffle iron and cook according the waffle iron directions.

To serve, arrange your fixings ingredients in small bowls so guests can top their waffles as they like.