1. Vigorously mix the ingredients in a resealable bowl 500 ml; let sit 24hours at ambient temperature
2. Glassy liquid covers the dough; add 20 ml of flour and 53ml of water; Mix thoroughly and reseal for a other 24 hours
3. The day after , bubbles should appear on the surface; repate the 2nd step
4. The next day, mix thoroughly and discard ¾ of the mixture; add 100g of flour, mix thoroughly and close
5. Forman bubbles on the surface; repeat the 4th step 4 days in row.

The leaven is ready : maintain it , adding little to no water and flour daily. Keep in the fridge or at ambient temperature. For a more consistent taste use the sourdought Florapan.