Rub both sides of steak with oil; sprinkle with seasoning. Grill covered over medium heat or broil 4 in. from heat 5-8 min. on each side or until desired doneness. Let stand 5 min.

In large bowl, combine tomatoes, beans, onion, cilantro, lemon peel and juice and salt. Gently stir in avocado.

Slice steak and serve with bean mixture.