Cook the pasta according to package instructions. Once cooked, drain and rinse under cool water to avoid sticking and clumping. Set aside and allow the pasta to cool completely.
Once cool, transfer to a mixing bowl and add cucumbers, tomatoes, feta, olives and red onon. Set aside and prepare the dressing.
In a small bowl, whisk together the remaining ingredients until smooth. Pour dressing over the pasta mixture and toss until everything is evenly coated and combined. Serve immediately or store in the fridge for up to 4 days.