01 - 
                Pour water and lemon juice into a spacious bowl. Stir in your sourdough starter until completely blended.
              
              
              
                02 - 
                Dump in the flour, sugar, salt, and lemon zest. Stir everything until you can't see any dry flour.
              
              
              
                03 - 
                Wait half an hour, then with slightly wet hands, do one round of stretching and folding. Cover and let it sit.
              
              
              
                04 - 
                Between 30-60 minutes later, toss in your blueberries and do another round of stretching and folding. Cover and let it sit at room temp.
              
              
              
                05 - 
                Allow your dough to expand about 75%. You'll know it's ready when it looks puffy on top and you can see bubbles on the sides. This takes 10-14 hours.
              
              
              
                06 - 
                On a clean counter without flour, fold the dough like an envelope and work it into a tight ball. Put it in your floured basket.
              
              
              
                07 - 
                Stick it in the fridge for at least 8 hours but you can leave it there up to 2 days.
              
              
              
                08 - 
                Get your dutch oven hot at 450°F. Cut the top of your dough and bake with the lid on for 25 minutes, then take the lid off for another 10-15 minutes until it looks done.