1. Finely chop the cauliflower to resemble feta cheese crumbles. Place in a bowl and mix with salt and vinegar. Allow to marinate while you prepare the salad.
2. In a small bowl, combine the dressing ingredients and whisk until blended.
3. Arrange lettuce, tomatoes, cucumber, olives, and red onion in a serving bowl.
4. Drain the cauliflower of any liquid and sprinkle over the salad. Toss with dressing before serving.