In a small bowl, whisk the buttermilk, hot sauce, honey, cumin, garlic, lime juice and sprinkle with salt and pepper. Place the chicken into a re-sealable bag and pour the buttermilk marinade over. Marinate in the fridge, at least 2 hours and up to overnight.
Heat a grill or grill pan to medium-high heat. Remove the chicken from the marinade and sprinkle with salt and pepper. Grill the chicken until cooked through and 165 degrees F, about 5 minutes. Remove from the heat.
Place the cheese on the bottom of each roll, then top with 2 chicken thighs, lettuce and a dollop of Cajun Ranch Dressing.
In a medium bowl, combine the mayonnaise, buttermilk, hot sauce, lemon juice, blackening seasoning, mustard, salt and cayenne. Fold in the scallions, celery, red peppers and garlic with the mayonnaise mixture.
Recipe courtesy of Jeff Mauro