Begin by boiling a pot of salted water. Add the rotini pasta and cook according to package instructions until al dente. Drain and rinse under cold water to stop the cooking process.
In a large mixing bowl, combine the cooked and cooled pasta with cherry tomatoes, cucumber, red bell pepper, red onion, sweet corn, and black olives. Toss gently to mix.
In a separate bowl, whisk together the Greek yogurt, mayonnaise, Dijon mustard, lemon juice, oregano, salt, and pepper to create a creamy dressing.
Pour the dressing over the pasta and vegetable mixture and toss until everything is evenly coated.
Adjust seasoning if needed, adding more salt, pepper, or lemon juice to taste.
Cover the salad and refrigerate for at least 30 minutes to allow the flavors to meld together.
Serve chilled, garnished with freshly chopped parsley for an added touch of color.
Notes
Chill for at least 30 minutes for the best flavor.