1 boneless beef round steak (1 1/2 lb), trimmed of excess fat 3 medium stalks celery, thinly sliced (1 1/2 cups) 1 large onion, sliced 1 cup frozen whole kernel corn, thawed 1 cup chopped fresh cilantro 1 jar (20 oz) salsa 1 can (15 oz) black beans, drained, rinsed 1/2 cup beef broth 1