I've had tin of cod roe in the cupboard for about 2 years! I've never had them before either but my friend eats them often, she slices it up and fries it in a little bit of oil and has it with chips and mushy peas. She's not on a diet though but I did think that I'd try frying it in frylight, I've just never got around to it.
The Princes pressed cod roe is 4 syns for 200g can though, fresh cod roe is free.