1tablespoonchivessliced thin (or substitute green onions)
Whisk together all dressing ingredients except chives until well blended. Stir in chives, and set aside.
Arrange lettuce in two bowls, and arrange cucumber and tomatoes around the outer edges of each salad. Place half of the crab meat in the center of each salad, and top with half of the shrimp. Drizzle salads with desired amount of salad dressing.