Crab is quite expensive but this is not. Artificial crab (Surimi) is quite tasty and can be found in most stores now. This makes an easy first course. Could also be served in a wine glass with shredded lettuce in the bottom.
This is excellent on the barbecue and easy to do. Use lemon grass instead of lemon rind if available. Soy sauce can be substituted for the fish sauce but it will change the flavour. Add more hot spices if more fire is wanted.