I harvested my leeks, which also had been covered under snow for over a month. They were fine, I also discovered a whole row of forgotten carrots. They have got some frost, but taste very sweet, and the goats love them too. My cabbages however (they were autumn ones anyway, just didn't get them out in time) are gone, but the hens will still peck them enthusiastically.
My parsnips have not grown well at all this year, I think they got a virus, the leaves started to shrivel in the late summer aready, only tiny roots.