Cook green beans in boiling salted water to cover 5 minutes or until crisp-tender; drain. Plunge into ice water to stop cooking process; drain.
Arrange green beans, feta cheese, and next 5 ingredients in a 13- x 9-inch baking dish, keeping each ingredient separate from others.
Whisk together dressing and next 3 ingredients. Drizzle evenly over ingredients. Cover and chill 2 hours.
Transfer marinated ingredients to a large serving platter. Add salami, if desired. Serve with toasted French bread slices or large crackers. Garnish, if desired.
Note: For testing purposes only, we used Newman's Own Olive Oil & Vinegar dressing.