1. Stir together first 5 ingredients in a large bowl. Let stand 10 minutes. Stir in olive oil, and add salt and pepper to taste.
2. Cook green beans in boiling salted water to cover 3 to 4 minutes or until bright and crisp-tender; drain. Plunge beans into ice water to stop the cooking process; drain and pat dry. Toss together beans and olive mixture. Serve at room temperature, or cover and chill up to 2 hours.