01 -
Combine water and lemon juice in a large bowl. Add sourdough starter and mix well.
02 -
Add flour, sugar, salt, and lemon zest. Mix until all flour is incorporated.
03 -
After 30 minutes, perform a set of stretch and folds with dampened hands. Cover and rest.
04 -
After 30-60 minutes, add blueberries and perform another set of stretch and folds. Cover and let ferment at room temperature.
05 -
Let dough rise until increased by 75%, showing a domed top and side bubbles (10-14 hours).
06 -
Shape into a taut round on an unfloured surface using envelope folds and tension building. Place in floured proofing basket.
07 -
Refrigerate for at least 8 hours or up to 2 days.
08 -
Preheat dutch oven to 450°F. Score dough and bake covered for 25 minutes, then uncovered for 10-15 minutes until done.