I wouldn't freeze cooked cabbage, because I like cabbage lightly cooked (red included, just add vinegar at cooking time) but if you freeze it shredded (assuming hard 'drumhead' types) ready for cooking, then when you want to serve it steam, microwave or boil just long enough to defrost and get it hot through. Only tried it once, that was OK, but I suspect there is a risk of it going wrong....

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