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1
Mix the sourdough pre-dough together in a small bowl.
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2
Cover and let rest for 12 hours at room temperature.
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3
After 12 hours, mix the pre-dough with the main dough ingredients in a large bowl until the dough comes together.
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4
Remove to a floured working surface and knead for 15 minutes until smooth and elastic.
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5
Fold in the chocolate in batches.
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6
When all chocolate is folded in, knead for 1 more minute.
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7
Return dough to bowl, cover and let rise 2 hours at room temperature.
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8
After 2 hours, divide the dough into two equal portions.
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9
Shape into a round boules or longer oval loaf, or one each.
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10
Dust with a little flour and cover with a clean cloth.
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11
Let rise another 3 hours.
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12
Preheat oven to 230C/445F.
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13
While preheating, place a shallow tray at the bottom of the oven for creating steam.
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14
We'll be pouring in boiling water in right before baking to get the steam.
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15
When ready to bake, prepare some boiling water to pour in the tray at the bottom of the oven.
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16
Cut a slit down the center of each bread dough right before putting in oven to bake.
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17
Pour in some boiling water into the tray, then immediately put in the bread.
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18
Bake at 230C/445F for 10 minutes then remove the steam tray.
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19
Lower heat to 190C/375F and bak for another 25 minutes.
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20
(Total 35 minutes).
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21
Remove and let cool on a rack.
