1. Place potates in 2-quart microwave-safe bowl. ADd 1/4 cup water; cover with microwave-safe waxed paper. Microwave on high 12-14 minutes or until potatoes are tender. Drain; rinse with cold water to cool. Drain well.
2. Remove and discard skin from salmon; flake salmon. In small bowl, combine all dressing ingredients; blend well.
3. In medium bowl, combine cooked potaties, salmon, cucumber, and green beans; stir gently to mix. Add dressing; stir gently to coat. Cover; refrigerate at least 1 hour before serving.