01 - Bring a large pot of salted water to a rolling boil. Add the pasta and cook according to package directions until al dente. Drain in a colander and rinse under cold running water until completely cooled. Set aside to drain thoroughly.
02 - In a large mixing bowl, toss together the cooled pasta, sliced sun-dried tomatoes, halved cherry tomatoes, thinly sliced red onion, halved Kalamata olives, diced cucumber, chopped basil, and chopped parsley until evenly distributed.
03 - In a small bowl, whisk together the extra virgin olive oil, red wine vinegar, minced garlic, Dijon mustard, dried oregano, salt, and pepper until the dressing is smooth and well emulsified.
04 - Pour the prepared dressing over the pasta and vegetable mixture. Toss gently but thoroughly until every component is evenly coated with the dressing.
05 - Gently fold in the crumbled feta cheese, taking care not to break it down too much. Taste the salad and adjust salt and pepper as needed.
06 - Refrigerate the salad for at least 30 minutes before serving to allow the flavors to meld. Alternatively, serve immediately at room temperature.