Whisk together the mayonnaise, oil, vinegar, mustard, capers, parsley, salt, pepper, and scallions. Then add crabmeat and fold gently to combine.
Place tomato slices into each serving well, then dust with salt and pepper. Next, top each tomato slice with ½ avocado. Stuff each avocado evenly with crab salad.
To finish, garnish with capers or parsley, then chill and serve.
CreditCourtesy of The Oyster Bed.