Sometimes my fridge is set to be too cold and if there is not much in it, I find the vegies in the back of the crisper start to freeze. This week it happened to mushrooms, bok choy, and radishes.
I tried to "recover" them a bit by letting them sit in warm water for 5-10 minutes before chopping up for a stirfry or pasta sauce (i.e. not heaps of cooking time). (Although not the mushrooms - I have some idea you're not supposed to wash mushrooms because they go slimy, although soaking might be different.)
The mushrooms were OK even though frozen...but the radishes were horrible. They still had heaps of ice crystals inside, and even some I cooked, I thought the ice would melt and they would be OK, but somehow they were unnaturally crunchy and it was quite unpleasant to eat them.
So is there anything else I should try in this case, or is prevention the only answer?
(And yes I turned up the temperature on the fridge ;))