Mix the spelled flour, rye flour, salt and curry well. Add the sourdough mixture and water and knead well for at least 10 minutes (preferably in a kneading machine) and then roll in flour all around.
Place in a well-floured proofing basket and let rise for 12 hours at a minimum of 18 ° C.
Carefully tip out of the basket onto a baking sheet lined with baking paper.
Preheat the oven to 180 ° C and bake the bread for 40 minutes.
Then leave to cool on a board covered with a kitchen towel for at least 2 hours.