01 - Bring a large pot of salted water to a rolling boil. Add the short pasta and cook according to package directions until al dente. Drain through a strainer and rinse under cold running water until completely cooled. Set aside.
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.
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 mixture is well emulsified and smooth.
04 - Pour the dressing over the pasta and vegetable mixture. Toss thoroughly, ensuring every component is evenly coated with the vinaigrette.
05 - Gently fold in the crumbled feta cheese if using, taking care not to break it down too much so it retains some texture throughout the salad.
06 - Taste the salad and adjust the salt and pepper as needed. Refrigerate for at least 30 minutes to let the flavors meld, or serve immediately at room temperature.