Lobster Rolls are a quintessential New England creation and tied to Maine thanks to the state's multitude of these delicious crustaceans.
Combine first 7 ingredients in a large bowl. Cover and chill until ready to serve.
Spread butter on buns; press buns open, and place, buttered sides down, in a large nonstick skillet over medium-high heat. Cook until golden brown. Fill buns with lobster mixture, and sprinkle with chives and cracked black pepper.