In a small bowl, mix mayonnaise, mustard and honey. Pound chicken with a meat mallet to 1/2-in. thickness. Sprinkle chicken with steak seasoning. Grill chicken, covered, over medium heat or broil 4 in. from heat until a thermometer reads 165°, 4-6 minutes on each side Top with cheese during the last 1 minute of cooking., Grill buns over medium heat, cut side down, until toasted, 30-60 seconds. Serve chicken on buns with bacon, mayonnaise mixture and, if desired, lettuce and tomato.