Add the biga and remaining ingredients into the mixing bowl of a stand mixer. It helps to break up the biga into smaller pieces. Using a bread dough hook, beat at a low speed until the dough is uniform in texture – then increase the speed to medium and beat 10 minutes. Cover the bowl with plastic film and place it in a warm dry spot to rise.
Do one “turn” every 30 minutes – 3 turns in total. A turn is accomplished by reaching down to the bottom of the bowl, along one side, and pulling the bottom dough to the top. Repeat all the way around the bowl. That is one turn. A plastic dough scraper makes this job much easier.
Thirty minutes after the final turn, which is two hours total of rising, pour the dough onto a heavily floured surface – either your countertop or a baking pan or parchment paper. Divide the dough into two equal pieces and shape the dough by gently pulling it lengthwise and sideways to get the shape you want – approximately 4” x 10” and ¾” thick.
Dust the loaves with flour (use a metal strainer to create a snowfall effect) and then cover with a lightweight kitchen towel. Allow the loaves to proof for one hour.
Preheat the oven to 500 degrees which has been outfitted with a baking stone or steel and allow the oven to heat for at least 30 minutes.
Invert the loaves onto floured parchment and transfer them into the oven. After 5 minutes, lower the temperature to 450 degrees. Bake the loaves until they are a deep golden color – approximately 25 minutes.
Remove the loaves and cool on a wire rack.