A lobster roll is one of those dishes that feels extravagant and plainspoken at the same time. There is no need to decorate it into something it is not. Good lobster has its own sweetness, its own gentle brininess, and its own quiet luxury. The job here is simply to support that with a lightly toasted bun, a touch of lemon, and enough butter to make each bite feel complete.
The difference between a great lobster roll and an expensive disappointment is restraint. Do not chop the meat too fine, do not drown it in mayonnaise, and do not skip warming the bun in butter until the edges turn crisp and golden. The pleasure is in the contrast between tender lobster and that faintly griddled bread.