Bring a large pot of salted water to a boil. Cook the tortellini according to package instructions until al dente, approximately 4-5 minutes. Drain and rinse under cold water to stop the cooking process.
In a large mixing bowl, combine the tortellini, halved cherry tomatoes, diced cucumber, bell pepper, red onion, sliced black olives, mozzarella balls, and chopped basil.
In a separate small bowl, whisk together the olive oil, balsamic vinegar, dried oregano, salt, and pepper to create the dressing.
Pour the dressing over the pasta salad and toss gently until all ingredients are evenly coated.
Cover the salad and refrigerate for at least 30 minutes to allow the flavors to meld. Serve chilled or at room temperature.
Notes
Serve in a large salad bowl with extra basil leaves for garnish. Drizzle additional balsamic vinegar on top before serving for an appealing look.