Note: Persian cucumbers have lots of little seeds, which add to their flavor. If you have trouble digesting seeds, you can seed the cucumber easily by slicing it in half lengthwise and scooping out the seed-filled center. Place the diced cucumbers into a large mixing bowl along with all the other ingredients. Mix until vegetables are well coated with parsley, oil, lemon juice, and salt. Best served fresh at room temperature. You can also serve chilled for a more refreshing salad.