Peel the cucumbers and cut lengthwise. With a teaspoon, scrape out the seeds and cut into 1/2 thick pieces (they will look like half moons).
To assemble, place a cucumber on the skewer followed by a tomato (it will sit in the cucumber).
Next, add the feta and top it off with an olive.
Place on a platter with the dressing on the side for dipping.