- Place the halved chicken breasts in a ziplock bag and pour the buttermilk into the bag. Squeeze the air out and seal the bag. Let marinate in the refrigerator for 30 minutes minimum up to several hours. 
- In a shallow bowl combine the panko breadcrumbs, flour, baking powder, and spices. 
- Remove the chicken breasts from the buttermilk with a fork, shake off excess buttermilk, and dredge in the breadcrumb mixture to coat on all sides. Spray with oil spray from both sides. 
- Put the chicken breasts in one layer in the Airfryer basket and air fry at 375F (190C) for 10-12 minutes in total until internal temperature reads 175F (79C) and the chicken breasts are golden brown and crispy. Flip the chicken with a fork or cookie spatula after 5 minutes and spray with more oil if needed. 
- While the chicken is cooking, make the chicken sauce by combining all the ingredients in a bowl. Then make the slaw by combining shredded cabbage, vinegar, sugar and salt in another bowl. Let the slaw sit for 2 minutes then add 1/4 cup of the sauce you made before and stir until combined. 
- Then brush the cut sides of the Sandwich Rolls with butter and heat a large skillet over medium heat. Toast rolls buttered side down until browned and crisp, about 1 minute. 
- To assemble the sandwiches, spread some sauce on the bottom roll, place a fried chicken breast on top, and top with slaw.