If you purchased whole crab or crab legs, steam, bake, or grill your crab until hot – approx. 20 minutes; crack and pull out as much of the meat as you can. If you purchased lump meat, remove from container and set aside; drain any excess water.
Finely dice your shallot and chives, gently mix by hand into crab in a large mixing bowl.
Add black pepper, mayo, and sriracha and mix in gently by hand or by spoon- you don’t want the crab to break apart too much. Taste your crab; do you need more spice? Is there enough mayo? This is all to your taste.
To prevent the crab from making the buns soggy, line each bun with lettuce. If you think your buns are too thick and want more crab to bun ratio, feel free to tear out some of the excess bread from the bun.
Generously portion out your crab into the bun and top with tomatoes. Fin.