Mix all ingredients in the bowl of a stand mixer.
Knead with a dough hook for 10–15 minutes, until the dough is smooth, stretchy, and supple.
Shape into a ball, place in a lightly oiled bowl, and cover with a towel or plastic wrap.
Bulk ferment in a warm spot (about 23°C / 73°F) for 5–7 hours, or until doubled.
Turn the dough out, divide into two loaves, and rest one while shaping the other.
Fold edges toward the center, then tighten the surface by pulling the dough toward you.
Place seam side up in a floured banneton basket.
Cover and refrigerate overnight for a cold proof.
The next morning, preheat a Dutch oven to 250°C (500°F) for 1 hour.
Turn the dough onto parchment, score with a lame, and carefully transfer into the Dutch oven.
Bake covered for 20 minutes, then uncover, lower oven to 235°C (450°F), and bake 15–20 more minutes.
Cool on a wire rack before slicing.