01 - Bring a large pot of salted water to boil. Add fresh cheese tortellini and cook according to package directions, approximately 7 minutes until al dente. Drain thoroughly and rinse under cold running water to stop cooking process. Transfer to a large bowl and set aside.
02 - While pasta cooks, halve the cherry tomatoes. Dice cucumber into 1/2-inch pieces. Finely dice red bell pepper. Thinly slice red onion into half-moons. Slice black olives into rounds.
03 - In a large mixing bowl, combine cooked tortellini, cherry tomatoes, cucumber, red bell pepper, red onion, black olives, halved mozzarella balls, and torn fresh basil leaves.
04 - In a small bowl, whisk together extra-virgin olive oil, red wine vinegar, Dijon mustard, minced garlic, dried oregano, salt, and black pepper. Whisk vigorously until emulsified and creamy.
05 - Pour dressing evenly over salad mixture. Using a large spoon or salad tongs, toss gently to coat all ingredients evenly without tearing the tortellini or crushing the vegetables.
06 - Sprinkle grated Parmesan cheese over the top. Toss lightly once more. Serve immediately at room temperature, or refrigerate for up to 2 hours to allow flavors to meld together before serving.