1In large bowl, combine beans, bread crumbs, corn, onion, chiles, cumin, salt and egg; mix well.
2Heat oil in 12-inch nonstick skillet over medium-high heat until hot. Spoon mixture into skillet forming 4 mounds; flatten each to form 1/2-inch-thick patty. Cook 6 to 8 minutes or until thoroughly heated and lightly browned, turning once.
3Place lettuce, cooked patties and tomato slices on bottom halves of buns. If desired, top with ketchup or mustard. Cover with top halves of buns.