Cook orzo according to package instructions. Be sure to salt water! Once cooked, remove from stove to cool.
Add cooled orzo to large mixing bowl. Dice red onion and zucchini and add to bowl. Halve tomatoes and olives and mix into bowl. Mix in feta cheese crumbles.
In separate bowl whisk together olive oil, lemon juice and seasonings. Pour dressing over orzo and vegetables. Cover and refrigerate for at least one hour. That's it, enjoy!