This is wonderful: light and refreshing and very, very easy to put together. It does, however, need to be cooked, if that's the word, at the last minute; any more than 10 minutes' steeping and the lime juice denatures and bleaches the salmon too much. Though if the idea of uncooked salmon spooks you - though why? - you can turn the slices quickly in a hot, oilless frying pan first.
If you get the salmon from a fishmonger, ask for it to be sliced like smoked salmon; otherwise just buy escalopes.
Recipe posted by Nigella