1In medium bowl, mix all ingredients except butter, buns and dill dip. Shape mixture into 4 patties, 3 1/2 inches in diameter, using heaping 1/2 cupful for each patty.
2In 12-inch nonstick skillet, melt butter over medium heat. Add patties; cook 10 to 12 minutes, turning once, until brown and thoroughly cooked. Serve on buns with dill dip.