Whisk together mayo (1/2 cup), lime juice (1 tablespoon), taco seasoning (2 tablespoons), and ground black pepper (1/4 teaspoon) in a small bowl.
In a large bowl, combine chicken breast (2 cups), finely diced red onion (1/2 cup), diced bell pepper (1/2 cup), and diced cilantro (1/4 cup), and corn.
Pour dressing over the chicken and vegetables and fold to combine.
Notes
This recipe make about 3 cups of chicken salad, which would make 1 serving equal to 1/2 cup.