In the morning, 4-5 hours before you want to bake, mix the levain ingredients in a bowl and stir well until thoroughly combined. Add it to a clean jar and loosely cover it. Leave it in a warm spot until it doubles in size.
Add the flour, water, orange juice, zest, doubled starter, sugar and salt in a large bowl.
Use a fork to begin to combine it, then switch to your hands and make a rough and shaggy dough.
Tip the dough onto a lightly floured surface and knead it until it is smooth and strong. Alternatively, mix the dough in a bowl of a stand mixer fitted with a dough hook attachment on low speed.
Flatten the dough out and press on half the cranberries. Fold over one side into the middle, then do the same for the other – like a pamphlet.
Press on the remaining cranberries, then roll the dough into a roll.
Shape it into a ball and place the dough into a bowl or container with a lid and cover.
Let the dough proof in a warm spot (ideally at around 25°C/77°F) until it has risen by about 50%. You can create a warm spot by placing the dough bowl in turned-off oven next to a mug of boiled water. Replace the water as it cools down.
Then cover the dough tightly and place it in the fridge overnight.