Day 2: In the morning, feed your starter as you typically would, and allow to rise until doubled and active. Must pass the water-float test (see notes).
In the afternoon, measure your water into a medium-large mixing bowl. Add your sourdough starter (can do float test now if preferred).
Whisk together the flour and the salt in a clean, medium-sized mixing bowl. Add to water and starter mixture.
Combine all ingredients together to form a rough dough, you may need to mix by hand to fully incorporate all of the ingredients.
In the mixing bowl, knead the dough for about 10 seconds, then allow the dough to rest for approximately 10 minutes. At this stage it should be quite sticky, and is what is sometimes referred to as the ‘shaggy dough’.
After 10 minutes, knead the dough in the bowl for another 10 seconds and allow to rest for another 10 minutes.
After the second rest has passed, knead for a final time, again it should only take 10-20 seconds. Your know your dough has a strong gluten structure when it is able to pass the ‘window-pane’ test. To perform the window-pane test, gently grab the dough from the middle of the ball and gradually begin to thin it, as if you’re making a pizza crust in the air. You want to be able to see the dough stretching until you can see light through the dough, without the dough tearing.
Once you have kneaded the dough the final time, shape it into a rough ball in the mixing bowl, and cover with a damp kitchen towel and allow to rise until evening. It should approximately double in size.
Evening: Place the dough on a lightly floured work surface and gently ‘punch down’. We just want to normalize the dough, and knock out a few air bubbles, without fully kneading it again. Form the dough into a tight ball and place within your prepared proofing basket (see notes). Dust the top of your dough lightly with flour and cover with a tea towel. Allow the dough to proof overnight in the refrigerator.