Phase: mix 100 g flour with 100 cc water, cover and let rest for 24-48 h
at 20øC. Phase: add same amount and mix well, cover and let rest for 24 hr.. Phase: add 200 g flour and 200 cc water, mix well, cover and let rest for 24 h. It should have an appetizing acid smell and will last for 1 bread (other recipe), leaving a rest of 100 g leaven for the faster leaven increase. Leaven increase: add 100 g leaven, 350 g rye flour and 350 cc water (40øC), mix well and let rest for 12-24 h at 20øC. Between two baking circles you can store the leaven rest in the fridge up to 8 days. For longer storing (up to four weeks) add rye flour to the leaven till it
gets crumbly.