I've been wanting to do this for ages, since I had it in a restaurant. SO easy to make and results in amazingly juicy fish. Don't worry about all the salt, it doesn't go into the fish, it forms a crust which you break off once cooked to reveal the fish. You could also do this with sea bream. Fish obviously come in all sorts of sizes, so choose ones that would be individual portion sizes. You'll find that it's easier to remove the salt if you can get in to the sides, so build it up on a shallow pan rather than using a deeper pan. Serve with boiled new potatoes and a crisp green salad.