Direction :

1. Mix the dough. Place the starter, salt, and water in a large bowl. Stir with a spatula to combine — it doesn’t have to be uniformly mixed. Add the flour. Mix again until the flour is completely incorporated. Transfer to a straight-sided vessel (if you have one.) Cover vessel with tea towel or cloth bowl cover and let stand 30 minutes.
2. Stretch and fold: after 30 minutes have passed, reach into the vessel and pull the dough up and into the center. Turn the vessel quarter turns and continue this pulling 8 to 10 times. See video for guidance. Let the dough rest for another 30 minutes; then repeat the stretching and folding. If possible, repeat this cycle twice more for a total of 4 stretch and folds. By the 4th cycle, you will notice a huge difference in the texture of the dough: it will be smoother, stronger, and more elastic.
3. Bulk fermentation: Cover vessel with a tea towel or bowl cover and set aside to rise at room temperature (70ºF/21ºC) for 4 to 18 hours (the time will vary depending on the time of year, the strength of your starter, and the temperature of your kitchen; see notes above) or until the dough has roughly doubled in volume. (UPDATE: In the past I have recommended letting the dough rise until it doubles in volume. If you’ve had success with this, continue to let the dough double. Recently, I have been stopping the bulk fermentation when the dough increases by 50% in volume, and I feel my dough is even stronger in the end.) Note: Do not use your oven with the light on for the bulk fermentation — it is too warm for the dough. When determining when the bulk fermentation is done, it is best to rely on visual cues (doubling in volume) as opposed to time. A straight-sided vessel makes monitoring the bulk fermentation especially easy because it allows you to see when your dough has truly doubled.
4. Portion and shape: Turn the dough out onto a work surface and shape into a rough ball, using as much flour as needed — the dough will be sticky. Using a bench scraper, divide the dough into 4 equal portions. Sprinkle portions with flour. With floured hands, roll each portion into a ball, using the pinkie-edges of your hands to pinch the dough underneath each ball. Transfer each round of dough to a plastic quart container, cover, and store in fridge for at least 6 hours or up to 3 days or transfer to the freezer for up to 1 week. (To thaw, remove a container (or more) and let thaw in the refrigerator for 1 day or thaw at room temperature for 8 hours. Then, proceed with the recipe.)
5. Make the pizzas: Pull out a round (or more) of dough from the fridge one hour before you plan on baking. Dust dough with flour and place on a floured work surface. Let sit untouched for about an hour (a little longer or shorter is fine). Place a Baking Steel or pizza stone in the top third of your oven. Set oven to 550ºF. Heat oven for at least 45 minutes but ideally 1 hour prior to baking. 
6. Shape the dough: Gently shape dough into a 10-inch (roughly) round handling it as minimally as possible. (See video for guidance.) Lay a sheet of parchment paper on top of a pizza peel. Transfer the dough round to the parchment-lined peel.