In a large pot, bring salted water to a boil. Add the rotini pasta and cook according to package instructions until al dente. Drain and rinse under cold water to cool.
In a large mixing bowl, combine the halved cherry tomatoes, diced cucumber, diced red bell pepper, chopped red onion, and sliced Kalamata olives.
Add the cooled rotini pasta to the mixed vegetables.
In a small bowl, whisk together the olive oil, red wine vinegar, dried oregano, salt, and pepper until well combined.
Pour the dressing over the pasta salad and toss until all ingredients are evenly coated.
Gently fold in the crumbled feta cheese and chopped parsley.
Taste and adjust seasoning if necessary.
Cover the salad and refrigerate for at least 30 minutes before serving to allow the flavors to meld.
Notes
Serve in a large salad bowl, garnished with additional feta and parsley on top. For added flair, drizzle a little extra olive oil over the top just before serving.