1Mix active sourdough starter and water in a large bowl.
2Add salt and gently mix.
3Add in bread flour and mix until all of the flour is fully hydrated (3-5min).
4Rest covered with a damp dish towel for 1 hour.
5Stretch and fold the dough 4 times every 30 minutes over 2 hours.
6Cover the dough with a damp dish towel between every stretch and fold.
7After 2 hours of stretch and folds, rest dough for approximately 1 hour (you may need longer depending on the temperature of your home and how active your starter is).
8Flip dough out of your bowl on the counter.
9Divide your dough into two equal pieces.
10Shape dough pieces and place in a banneton covered in the fridge overnight.
11The next morning, preheat oven with a dutch oven inside at 450f° for 45min-1hour.
12Remove dough from the fridge and score.
13Place loaf in the preheated dutch oven with the lid on for 20 min.
14Remove the dutch oven lid.
15Turn oven down to 400f and bake the bread for an additional 10-20 min until golden brown.