Pound chicken to 1/2 -in. thickness. Pour buttermilk into a large resealable plastic bag; add chicken. seal bag and turn to coat; refrigerate for 8 hours or overnight.
In a shall bowl, combine the biscuit mix, cornmeal, paprika,salt,poultry seasoning, garlic powder,pepper and cayenne. Remove chicken one piece at a time,allowing excess buttermilk to drain off. Discard buttermilk. Coat chicken with cornmeal mixture; place in a 13-in. x 9-in. x 2-in. baking dish coated with cooking spray.
Bake,uncovered. at 400F for 12 minutes. Turn chicken. Bake 8-12 minutes longer or until juices run clear and coasting is lightly browned. Serve on rolls with lettuce and tomato.