In a large pot, bring salted water to a boil. Add the fusilli pasta and cook according to package instructions until al dente. Once cooked, drain the pasta and rinse it under cold water to stop the cooking process, then set it aside to cool completely.
In a large mixing bowl, add the halved cherry tomatoes, diced cucumber, halved kalamata olives, diced red bell pepper, and finely chopped red onion. Mix gently to combine the vegetables evenly.
Once the pasta is cool, add it to the bowl with the vegetable mixture. Use a spatula to gently toss everything together, ensuring the pasta is well mixed with the vegetables.
In a small bowl, whisk together the extra virgin olive oil, red wine vinegar, dried oregano, and a generous pinch of salt and freshly ground pepper until the dressing is well-emulsified.
Pour the dressing over the pasta salad. Use a spatula or wooden spoon to mix gently, ensuring that all the ingredients are coated with the dressing for full flavor.
Carefully fold in the crumbled feta cheese and the chopped parsley, being cautious not to break the feta too much.
Sample the pasta salad and adjust the seasoning with additional salt and pepper if necessary to suit your taste.
Cover the salad bowl with plastic wrap or a lid and refrigerate for at least 30 minutes. This chilling period allows the flavors to marry beautifully.