Prepare a wheat sourdough.
Knead all ingredients, except the washing-in water, into a smooth and well-kneaded dough.
Only slowly add the wash-in water when this is almost finished kneading.
Dough temperature approx. 26°C.
Give a bulkproof of 60 minutes.
Scale dough pieces approx. 550 grams and carefully round them. Handle lightly, do not degas too much.
First proof approx. 30 minutes.
Mould the dough pieces into batard model.
Place the moulded dough pieces into proofing baskets prepared with rye flour.
Place the filled proofing baskets, covered with plastic, in the refrigerator for approximately 12 hours at 4°C.
Next day:
Turn the proofing baskets upside down onto the inserters prepared with rice flour, and cut the dough pieces lengthwise with a sharp knife.
Bake approx. 35 minutes at 230°C. with proper steam.