Soured/Barrel Cabbage
Basic ingredients: very clean barrel and the same for all gear used(wash with boiling hot water)
white, large, heavy, dense headed winter cabbage - outer green leaves removed, finely(1.5-3mm) shredded, cores retained(smaller, looser heads can be added whole with core cut out, this is optional)
salt - 3% of the weight of cabbage
Flavourings(depends, where you're coming from): white or black peppercorns, bay leaves, garlic, crab apples, chillies, savory, horseradish, dill, caraway seeds.(I'm picking the ones I like, do not mix bay and caraway)
Method:
1) You can layer the bottom of the barrel with larger cabbage leaves(or omit) Put on it peeled crab apples, 1-2 handfuls of savory, if used, a few med hot chillies whole, a few garlic cloves, 2-4 horseradish roots cut in half)
2) Put the cabbage, salt, caraway(almost as much as salt) into the barrel in layers, scatter the seasonong over the cabbage evenly and so between layers
3) Treading it down: you can use a wooden club. Gently but firmly press the cabbage down, without breaking it to remove air pockets.
Repeat 2 and 3 till ingredients are used up. Leave AT LEAST 10 cm or more space from top of the barrel.
Retained cores(and whole cored small heads) get packed in around the middle, the same way, surrounded by the cut cabbage, no air pockets left.
Make incisions in cores and rub with salt.
If well clubbed down it already should have a lot of juices, if not keep clubbing, juices should cover the cabbage at all times.
4) Sealing and weighting down
perforated cling film, wood planks or lid, weighted by stones or else on top, to keep cabbage under juices.(20-25% of the weight of cabbage)
Lid should be level.
Fermentation
warm 21-24 C
Depending on cond cabbage ferments at a high range, 0-20 C, so the process can take 5-90 days. Autumn average: 30.
During ferm it needs frequent checking, bubbles and all gunk forming needs regular removal. If it is overrunning needs cooler place. If juices are lost, or not enough forming needs topping up to well cover cabbage with boiled, cooled 3% salt water solution.
Storage
cool -2-0 C
Due to acid formation and chemical processes the later the cabbage is used the longer its cooking time will be. Try to consume as much raw, as you can and pleeease do share!