This healthier take on a lobster roll uses crab because it's usually easier (and less expensive) to buy. But by all means use lobster if you prefer. Serve with coleslaw and an ice-cold beer.
Make Ahead Tip: Cover and refrigerate the crab filling (Step 1) for up to 1 day.
Tip: Crabmeat (already removed from the shell) can be purchased canned, in shelf-stable pouches, frozen or pasteurized. Pasteurized usually has the best flavor; look for it in the fresh seafood section of the market. Crab from the U.S. and Canada are both considered good choices for the environment. If you live in an area known for crab, you may be able to get freshly cooked crabs at the seafood counter of your local market.
1 1/2 starch, 1/2 other carbohydrate, 2 lean meat, 1 fat