Remove the biga from the fridge and let sit for 15-30 min to warm up a bit.
Place in the stand mixer with the other dough ingredients and stir with a rubber spatula until a mass forms.
Knead on high with the dough hook until it comes together. This will take 12-15 minutes. This dough should start out looking almost like pancake batter due to the high water content. If you have a solid ball of dough at the start you need to add a bit more water.
It will seem like it isn't going to come together, but be patient. Once the gluten starts to from it will come together into a ball. Once it is smooth, stretchy and shiny and in a ball, you are done.
Place in a dough bucket or bowl sprayed with oil spray.
Cover with plastic wrap and let rise 2-3 hours until it is almost tripled.
One hour before baking, place a pizza steel or baking stone in the oven at 475. Also place a cast iron pan or other oven safe pan on the lower rack.
Generously flour the counter and gently turn out the dough. You don't want to deflate it so handle gently. Sprinkle more flour on the top so it doesn't stick at all.
Cut into 8 pieces and gently stretch each piece, again being careful not to deflate too much. If there are large air bubbles you can gently deflate the really big ones with your finger. Place on the back of a cookie sheet lined with parchment. Cover with plastic wrap and allow to rise until bubbly, about 30-45 minutes.
Transfer to the pizza steel on the parchment. Pour about 1/2 cup of water into the lower pan in the oven to create steam. Also spray the tops with water.
Allow to bake for 10-15 minutes for rolls or 25 min for loaves. This depends heavily on your oven so adjust the time accordingly. Rolls should be starting to brown and fully cooked but you don't want to over bake them.
Remove from oven to a cooling rack and cool completely.