1. Combine first 7 ingredients in a small bowl; stir with a whisk.
2. Steam green beans, covered, 14 minutes or until crisp-tender. Rinse with cold water. Drain well, and pat dry with paper towels.
3. Combine beans and onion in a large bowl; add dressing, and stir gently. Sprinkle evenly with crumbled bacon.
carbo rating: 5