First, slice chicken into 1-inch cubes and season with seasoning salt.
Heat olive oil in a medium pan and cook chicken until golden on all sides and cooked through. Set aside and allow to cool as you assemble the salad.
Next, make the southwest dressing. In a measuring cup or mixing bowl whisk together the ranch, lime juice, sugar and taco seasoning until fully incorporated. Make sure to scrape down the sides not to miss any pockets of dry ingredients.
Drain and rinse the black beans and pay dry. Then drain the corn and quarter the tomatoes.
To a large bowl, add the coleslaw mix, cooled chicken, shredded cheese, tomatoes, black beans and corn.
Pour the southwest dressing over the salad and use tongs to toss all the ingredients together until fully combined. *If you like a lot of dressing on you salad, feel free to add more but be careful not to over saturate
Cover the bowl and refrigerate for 1 hour before serving.