In the bowl of a stand mixer, combine sourdough starter, bread flour, all-purpose flour, water, salt, and olive oil.
Using a dough hook attachment mix the ingredients together on medium speed until the dough is stretchy and passes the windowpane test.
Transfer the dough to a large oiled bowl, cover and allow the dough to go through bulk fermentation at room temperature for 8 hours or until doubled in size.
Place a pizza stone or cast iron skillet into the oven and get it preheating to 450 degrees F (230 degrees C).
Divide the dough into 2 to 3 equal pieces, cover them, and allow to rest for about 10 minutes.