This bread is very moist and loose, but only use as much additional flour as you need to be able to handle it without it sticking. Be sure to start your starter dough 8-12 hours ahead of when you want to make your bread.
For the Ciabatta Dough: In a large bowl or the bowl of a stand mixer fitted with a paddle attachment, stir the yeast in to the water. Add all of the Yeast Starter Dough that you made earlier and has been sitting. Mix briefly. Add the flour and salt and mix to combine. Beat on medium-low for 3 minutes. Stop the mixer and let dough rest for 10 minutes. Beat again on medium-low for 3 minutes. Stop again and let dough rest for 10 minutes.
Be sure to read the "Cook's Notes" in the original post, for more tips, options, substitutions and variations for this recipe!