I have never really thought of myself as a person who could wrap, fold or fiddle about with food or felt that way inclined. But you know, when you get into it, it's really quite OK - actually, more than OK. These wraps are curiously relaxing to assemble and everyone is always bowled over by them. They're a very good way of injecting a little zing into the proceedings without having to slave for hours over a hot hob.
I have added the option of the crab wraps as I do understand not everyone is happy working with or even eating raw tuna. But please try those, too: they are actually a very unspooky experience. Just be sure to ask a fishmonger for sashimi-grade tuna and buy it the day you want to eat it.
For both these recipes I've given the basic unit of wrap; that's to say, amounts are sufficient to fill 1 tortilla, which in turn will yield 3 pieces once rolled and cut.
Recipe posted by Nigella