01 - Cook pasta according to package directions until al dente. Drain thoroughly and rinse under cold running water to stop cooking process. Set aside to cool completely.
02 - If using meat, heat skillet over medium heat. Add ground beef or turkey and cook, breaking apart with spoon, until fully browned. Drain excess fat and allow to cool before adding to salad.
03 - In large mixing bowl, combine cooled pasta, cooked meat (if using), cherry tomatoes, black beans, corn, red onion, bell pepper, lettuce, cheese, and olives. Toss gently to distribute ingredients evenly.
04 - In small bowl, whisk together sour cream, mayonnaise, taco seasoning, lime juice, salt, and pepper until smooth and fully incorporated. Adjust seasoning to taste preference.
05 - Pour dressing over salad mixture and toss thoroughly until all ingredients are evenly coated. 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 crunch and freshness.
07 - Serve chilled or at room temperature as main dish or side.