01 - Cook pasta according to package directions until al dente. Drain thoroughly, rinse under cold water to stop cooking process, and set aside to cool completely.
02 - If using meat, heat skillet over medium heat and add ground beef or turkey. Cook while breaking apart with spoon until fully browned, approximately 5-7 minutes. Drain excess fat and transfer to plate to cool.
03 - In large mixing bowl, combine cooled pasta, cooked meat (if using), cherry tomatoes, black beans, corn, red onion, bell pepper, lettuce, shredded cheese, and black olives. Toss gently to distribute evenly.
04 - Whisk together sour cream, mayonnaise, taco seasoning, lime juice, salt, and pepper in small bowl until smooth and fully incorporated. Adjust seasoning to taste preference.
05 - Pour prepared dressing over salad mixture. Fold gently until all ingredients are evenly coated with dressing. Cover and refrigerate for at least 30 minutes to allow flavors to meld.
06 - Just before serving, fold in crushed tortilla chips and fresh cilantro to maintain texture contrast. Serve immediately chilled or at room temperature.