In a large bowl add warm water and starter, stir until combined
Add flour and salt, combine to create a rough dough
Cover with plastic or damp towel and place in warm place, 75-85 °F is optimal
Fold the dough 4-5 times every 30 minutes for 2 hours, total of 4 sets of 4-5 folds each time. See section on folding in post
Place in plastic or glass container, cover with plastic or damp towel, on the outside of the container mark the top of the dough line,until it rises 1 ½ times its original size. Don't overproof!
Gently shape your dough, let rest, covered for 30 minutes. See section on shaping in post
Using bench scraper or hands to create surface tension and your final shape, place in rice flour dusted banneton. Cover with plastic and place in refrigerator for 12-48 hours. See notes in post
When you are ready to bake your dough place dutch oven with lid in cold oven, preheat to 500 °F.
Once oven is at temperature, place parchment paper or silicone sling on top of dough, flip over so smooth side is up. Using blade or wheel make your cut and/or design. Immediately place cold loaf in hot dutch oven being very careful not to burn yourself, add 3-4 ice cubes on the sides, not touching the dough. Quickly replace lid and return to hot oven. Lower temperature to 450 °F for 20 minutes
Remove the lid and lower the temp to 400 °F, continue baking for 15-20 minutes until desired crust darkness is achieved. Carefully remove loaf from dutch oven, place on cooling rack allowing to cool completely before slicing. Congratulations sourdough baker!