This salad is very easy to prep; the dressing blends quickly together and the dish was ready to plate in less than 10 minutes.
Tear the lettuce into pieces and arrange them on a large salad plate. Place the sliced cucumbers and onions on the lettuce
In a blender or food processor, combine the feta cheese, olive oil, oregano, and lemon juice and blend until smooth. Add more olive oil as needed to reach desired consistency.
Just before serving, pour the dressing over the salad. Sprinkle with pepper.