Heat a griddle or saute pan over high heat until it begins to smoke, and then turn the heat down to medium-high.
Spread some butter on both sides of each hot dog bun. Toast the buns on the hot griddle until golden brown on both sides, about 1 minute per side depending on the temperature of the griddle. Once toasted, remove from the heat and separate the two sides of the buns and hold for plating.
In a bowl, combine the lobster, lemon juice, mayonnaise, salt and pepper, and gently mix to coat the lobster but not break up the meat.
To plate the lobster roll, place one piece of the hotdog bun on the plate with a lettuce leaf on top. Spoon 4 1/2 ounces of the lobster salad on top of the lettuce leaf and then top with the other side of the hot dog roll. Repeat with the remaining rolls, and serve each with a lemon wedge.