Combine ingredients and knead briefly.
Divide into 3 balls, place in covered containers in fridge for 1–5 days.
Remove from fridge, form into ball, and allow to warm and rise for 2 hours before shaping, topping, and baking.
Quick crust option: Rather than placing a crust in fridge, add 1/4 c. active sourdough starter and a similar amount of flour (enough to offset the moisture in the starter). Allow to rise for 2 hours, shape, top, and bake.