Cook the tortellini according to package instructions until al dente.
Drain and rinse the tortellini under cold water to cool.
In a large mixing bowl, combine the tortellini, cherry tomatoes, cucumbers, olives, red onion, and bell peppers.
In a small bowl, whisk together olive oil, balsamic vinegar, salt, and pepper.
Pour the dressing over the tortellini salad.
Gently toss to combine all ingredients.
Add fresh basil and mix gently again.
Taste and adjust seasoning if needed.
Cover and refrigerate for at least 30 minutes to let flavors meld.
Serve chilled or at room temperature.