Cook the rotini pasta according to package instructions until al dente. Drain and rinse under cold water to cool.
In a large bowl, combine the cooked pasta, diced chicken, cherry tomatoes, cucumber, red onion, feta cheese, and fresh basil.
In a small bowl, whisk together the olive oil, balsamic vinegar, Dijon mustard, honey, salt, and pepper until well combined.
Pour the dressing over the pasta salad and toss gently to combine all ingredients evenly.
Refrigerate the salad for at least 30 minutes to allow the flavors to meld. Serve chilled or at room temperature.