Peel onions. Wash English cucumber and tomatoes. Dice vegetables uniformly.
In a large bowl, add ingredients except feta cheese.
Store in refrigerator. Prior to service, add crumbled feta cheese.Serve Cold. Bulk: Portion into service dishes or leave in bulk for dining room service.Cold Plating: plate alone or as a side dish. Place on the cold side of the tray prior to service. Food Accompany: Any appropriate entrée