Trim and discard ends. Slice the cucumber lengthwise and each half again lengthwise. Turn pieces and cut across into 1/2 inch pieces.
Slice the teardrop tomatoes in half lengthwise.
In a medium size bowl add the dressing ingredients and whisk together. Add the cucumber, tomatoes, olives, and crumble the feta cheese over. Toss to coat and serve or chill if not using immediately.