Place the green beans in the perforated steamer insert, cook in the steamer for 7 – 10 minutes until al dente.
Mix tomatoes, onions, garlic, basil, oregano, mint, thyme, vinegar and oil. Season the dressing with salt and pepper.
Mix the green beans with the tomato-herb vinaigrette. Let the salad stand for a while, season with salt and pepper.
Arrange the salad in portions or on a large platter, sprinkle with olives and feta cheese.