[orwin]

You should try canned tomatoes.

I sometimes use tomatoes for my winter dishes (pizza, Ukrainian borscht and Indian Dahl), it used to be terrible. I've since learned that most canned vegetables do not have anything added when canned (not even salt or similar, it's just hot water basically), changed to that, and now I cook almost as much in winter than I do during summer.

[Agingcoder]

This is very true, and what I do now. This doesn't work for all vegetables, but works really well with tomatoes.