Drain the pasta in a colander and run it under a cold tap until cooled. Stir the dressing, cucumber, tomatoes, basil, feta and olives, if using, into the pasta and serve.
All the tasty toppings—including red onions, tomatoes, olives, feta cheese and a zesty dressing—give it extra interest ... otherwise, you might end up with a gummy pasta salad. This Greek orzo salad ...