To make the dough, add 1/2 cup of water to 1 cup unfed sourdough discard and stir. Add remaining ingredients and knead with a dough hook or in a stand mixer until the dough cleans the signs of your bowl. If the mixture seems really dry, you can add the remaining water a splash at a time.
Put the dough in a grease bowl and cover with a wet tea towel. Allow to rise for 4 hours or until doubled.
Once doubled, divide the dough in two and shape into a well seasoned cast iron pan or a grease baking sheet. Add your toppings and bake at 450°F for 15-20 minutes.