Remove the first leaves of the cabbage but do not rinse the rest of the cabbage because it is the bacteria naturally contained in the cabbage which will allow lactofermentation.
Cut the cabbage into quarters and remove the ribs and core.Cut the cabbage into very fine strips using a large knife or mandolin.
Place the cabbage in a large salad bowl.Add salt and berries (juniper, pepper, cumin). Mix well and let sit for 30 minutes.
Transfer everything to clean glass jars, packing the cabbage tightly to within 2 centimeters of the rim.Close tightly and leave to rest for 2 to 3 days at room temperature and away from light.
After 2 or 3 days, check that the strips are completely immersed in their brine.If not, add a mixture of boiled water and salt (10 g of salt per liter of water) to cover the cabbage.
Close and store for 1 month, always at room temperature and protected from light.You can open it from time to time to let the gas escape.