Preparation Whisk oil, vinegar, garlic powder, and oregano in small bowl to blend. Season vinaigrette to taste with salt and pepper. Combine lettuce, cucumbers, tomatoes, onion, cheese, and olives in very large bowl. Drizzle with lemon juice and toss to combine. Add vinaigrette to salad and toss to coat.
Preparation Whisk oil, vinegar, garlic powder, and oregano in small bowl to blend. Season vinaigrette to taste with salt and pepper. Combine lettuce, cucumbers, tomatoes, onion, cheese, and olives in very large bowl. Drizzle with lemon juice and toss to combine. Add vinaigrette to salad and toss to coat.