The night before: Mix sourdough starter, AP flour, and water together in a large glass mixing bowl. Cover with a damp towel and let sit overnight.
The next morning: Preheat waffle iron
Reserve about 1/2 cup of the bubbly starter flour mixture the next day for future use.
Measure out 2 Cups of batter in a separate glass mixing bowl.
Mix in eggs, coconut oil, honey, vanilla, salt and baking soda until well combined.
Grease your waffle iron (I use coconut oil to do this)
Carefully add your batter (about 1/4 cup per square) to your iron and cook to your preference.