Heat 1-2 cups of water to a boil over a steamer basket. Add the shrimp and steam until just cooked -- 4 minutes should do it. Cool the shrimp on ice.
Peel and de-vein the shrimp and slice lengthwise (or leave them whole if you prefer).
Combine the shrimp and the remaining ingredients in a bowl. Chill for an hour or up to 24 hours. Serve in a bowl, on white bread with lettuce and tomato, or bridal shower-style with mini croissants.
