01 - Boil pasta according to package directions until al dente. Drain thoroughly, rinse under cold water to stop cooking, and set aside in a large bowl.
02 - If using meat, brown ground beef or turkey in a skillet over medium heat, breaking apart until fully cooked. Drain excess fat and let cool slightly.
03 - Halve cherry tomatoes, dice red onion and bell pepper into small pieces, shred lettuce, and chop fresh cilantro. Thaw frozen corn and drain black beans well.
04 - Add cooled pasta, cooked meat (if using), all vegetables, black beans, corn, cheese, and olives to a large mixing bowl.
05 - Whisk together sour cream, mayonnaise, taco seasoning, lime juice, salt, and pepper in a small bowl until completely smooth and well combined.
06 - Pour dressing over salad ingredients and toss gently until all components are evenly coated. Adjust seasoning as needed.
07 - Just before serving, fold in crushed tortilla chips and fresh cilantro to maintain crisp texture.