Save the crab shells to use as the serving vessels for this flavorful crab salad, with the claws for bonus points. Feel free to purchase cooked crabs so you don't have to do this yourself, meaning you need only remove the roe and separate the tender meat for mixing with the mayonnaise, chopped pickles, mustard, and boiled egg, saving the yolk for the garnish if that's your preference (and for bit of colorful contrast). Chill thoroughly before serving, topped with cilantro.