Before you go to bed, mix all ingredients for the Overnight Sponge in a medium sized mixing bowl. Cover and leave out on your counter overnight.
In the morning it will be bubbly and ready to use!
For the Waffles
Preheat your waffle iron so it is ready to use
When you are ready to make your waffles, add the egg, oil, salt and soda to the Overnight Sponge
Cook the waffles according to the waffle maker you have you should get 4, 8" round waffles. I find it better to not use cooking spray on my waffle maker, but you may need to depending on the kind you have.