Cook the orzo pasta 8-10 minutes following the package instructions. Drain and set it aside to cool down.
Meanwhile, cut the cucumber, tomatoes, olives, onion and parsley. Transfer to a serving bowl.
In a small bowl, whisk all of the dressing ingredients together.
When the pasta is cool, transfer it to the serving bowl along with the dressing.
Toss everything together.
Season with salt and pepper to taste. Serve.