Cook artichokes in saucepan of boiling salted water 2 minutes. Drain and cool. Arrange artichokes, cucumbers, tomatoes, bell pepper, onion, and olives on large platter. Whisk oil, vinegar, oregano, and lemon peel in small bowl to blend. Season dressing to taste with salt and pepper. Pour dressing evenly over salad; sprinkle with feta cheese and serve.