1. Cook green beans in boiling salted water to cover 4 to 5 minutes or until crisp-tender; drain. Plunge into ice water to stop the cooking process; drain.
2. Whisk together olive oil and next 4 ingredients.
3. Toss together spinach, next 5 ingredients, and green beans in a large bowl. Drizzle with olive oil mixture; toss gently to coat. Garnish, if desired. Serve immediately.