01 -
Splash water into a big mixing bowl and add the lemon juice. Stir in the sourdough starter till it’s all smooth.
02 -
Throw in your flour, sugar, salt, and zest. Stir everything until there’s no dry flour left.
03 -
Let it sit for 30 minutes, then stretch and fold with damp hands. Cover up and relax it for a bit.
04 -
Give it 30–60 minutes, then gently work the blueberries into the dough with another stretch—and—fold. Cover again and leave it to ferment at room temperature.
05 -
Let the dough rest till it’s grown about 75%, looking puffed-up with bubbles forming at the sides. This might take around 10–14 hours.
06 -
On a clean surface (without extra flour), fold the dough into a nice taut circle using envelop folds. Pop it in a floured proofing basket.
07 -
Cover the dough and chill it in the fridge for at least 8 hours, or as long as 2 days.
08 -
Heat your dutch oven to 450°F. Score the dough however you like and bake for 25 minutes covered, followed by 10–15 minutes uncovered until it’s golden and cooked inside.