Wash the tomatoes and cucumber under cool water. Dice tomatoes into chunks and slice cucumber into thick half-moons.

Peel and thinly slice the red onion, soaking it in cold water for about 5 minutes.

If using, slice the green bell pepper into thin strips.

In a large mixing bowl, combine the chopped tomatoes, cucumber, sliced red onion, and bell pepper (if using).

Toss in Kalamata olives.

Place slabs of feta cheese on top of the salad.

Drizzle olive oil over the salad and sprinkle with oregano and a pinch of salt.

Toss gently to combine the ingredients.

Transfer to a serving platter and let sit at room temperature for about 10 minutes before serving.