Cut cucumber in half length ways and scoop out the seeds, then cut in half length ways again. Thickly slice into chunks. Toss together with the onion, tomatoes and olives.
Whisk together the oil, red wine vinegar, oregano salt and pepper. Pour over the salad and toss until coated.
Finally add the feta cheese, traditionally in one piece or crumbled into bite size pieces. Drizzle with a little more oil and sprinkle with a little extra oregano.
Use ripe tomatoes and choose a variety that has plenty of flavour.Nutrition information is approximate and is meant as a guideline only. (It does not include seasoning with salt and pepper and the extra olive oil to drizzle.)