01 - Bring a large pot of salted water to boil. 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 including meat, heat a skillet over medium heat. Add ground beef or turkey and cook, breaking apart with a wooden spoon, until browned and fully cooked through. Drain excess fat and transfer to a plate to cool.
03 - In a large mixing bowl, add cooled pasta, cooked meat (if using), cherry tomatoes, black beans, corn, red onion, bell pepper, shredded lettuce, cheese, and black olives. Toss gently to distribute ingredients evenly.
04 - Whisk together sour cream, mayonnaise, taco seasoning, lime juice, salt, and pepper in a small bowl until completely smooth and well combined. Adjust seasoning to taste preference.
05 - Pour the prepared dressing over the salad mixture. Using a large spoon or clean hands, toss until all ingredients are evenly coated with the creamy dressing.
06 - Just before serving, fold in crushed tortilla chips and fresh cilantro to maintain optimal texture. Serve immediately or refrigerate until ready to serve.