In a large pot, bring salted water to a boil. Add the fusilli pasta and cook according to package instructions until al dente. Drain and rinse under cold water to cool.
While the pasta is cooling, prepare the vegetables. In a large mixing bowl, combine the halved cherry tomatoes, diced cucumber, red bell pepper, red onion, and thawed peas.
In a medium bowl, mix together the softened cream cheese, Greek yogurt, lemon juice, olive oil, dried dill, salt, and pepper until smooth and creamy.
Add the cooled pasta to the bowl with the vegetables. Pour the dressing over the pasta and vegetables and gently fold everything together until evenly coated.
Cover the bowl with plastic wrap and refrigerate for at least 30 minutes to let the flavors meld. Serve chilled and garnish with fresh basil if desired.