How to Make It
Step 1
Combine crabmeat, chives, mayonnaise, ketchup and 1/2 Tbsp. lemon juice in a medium bowl and mix with a fork to blend.
Step 2
In another bowl, combine remaining 1/2 Tbsp. lemon juice, tomatoes, avocado, oil, vinegar, and salt and pepper to taste, and toss gently.
Step 3
Arrange lettuce on each of four dinner plates. Divide avocado mixture among plates and scoop equal amounts of crab mixture onto each.