1. Steam asparagus, covered, 3 minutes or until crisp-tender. Drain and plunge asparagus into ice water; drain.
2. Combine asparagus, chicken, radishes, and dressing in a large bowl; toss well. Arrange 2 tomato slices on each of 4 plates; top each serving with 1 cup chicken mixture. Sprinkle with pepper, if desired.
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