Cook okra in small amount of water until tender but not mushy (about 5 to 10 minutes).
Drain. Arrange in single layer in glass dish (do not use a metal dish or container). Pour vinegar over the okra marinate in refrigerator 3 hours, Drain; discard vinegar.
Arrange okra in serving dish. Garnish with chopped tomatoes, onions, and ginger root. Serve chilled.