Used home made potato gnocchi and added some shiitake mushrooms in. Turned out pretty good. Since the numbers were skewed due to scaling, eyeballed some of the liquid ingredients.
Allowing the batter to bulk ferment overnight created amazing flavor depth. While you can ferment in a warm oven for 30-45 minutes and then be perfectly tasty, making the batter the day or night before results in a much better waffle. Be sure to use a large bowl as it will be more than double in size. Cover with cling film.