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.