In a large pot of salted boiling water, add the pasta. Cook according to package instructions until al dente. Drain and rinse under cold water to stop the cooking process.
While the pasta cooks, chop the cherry tomatoes, cucumber, bell pepper, and red onion. Set aside.
In a large bowl, whisk together the mayonnaise, sour cream, apple cider vinegar, Dijon mustard, garlic powder, salt, and pepper until smooth.
In the same bowl, add the cooked pasta, cherry tomatoes, cucumber, bell pepper, red onion, and thawed peas. Mix until everything is evenly coated with the dressing.
Cover the bowl with plastic wrap and refrigerate for at least 30 minutes to allow the flavors to meld.
Before serving, sprinkle with fresh parsley for an added touch of color and flavor.