Park's blog
White Sourdough "Boule"

Levain
40g starter
40g AP flour
40g bread flour
80g water
Dough
350g bread flour
122g AP flour
340g water
9g salt
184g levain
25g honey
Method
Mix levain and set in warm place for 6 hours
Mix flour and water 2 hours before levain is done
Mix everything
Slap and fold (I gave up half way through so the gluten wasn't well developed)
Set in oiled bowl and rest 30 min, then stretch and fold
Repeat 30 min rest then stretch and fold, 3 more times