1. Stir together butter and 2 tsp. hot sauce. Brush cut sides of rolls evenly with mixture. Place, cut sides up, on a baking sheet.
2. Bake at 350° for 8 to 10 minutes or until toasted.
3. Stir together blue cheese dressing, 2 tsp. to 3 tsp. hot sauce, and Creole seasoning. Add carrots, celery, and, if desired, onion; toss to coat.
4. Arrange chicken on bottom halves of rolls; drizzle evenly with remaining hot sauce. Layer chicken evenly with carrot mixture and crumbled blue cheese. Top with remaining roll halves. Serve with additional hot sauce, if desired.
Note: For testing purposes only, we used Frank's Original Buffalo Hot Wing Sauce, T. Marzetti's The Ultimate Blue Cheese refrigerated dressing, and Zatarain's Creole Seasoning.