Everyone's favorite comfort food casserole gets a delicious upgrade with the addition of chicken, hot sauce, chopped onion, and celery. Pepper jack cheese adds another layer of pleasant heat to the cheddar sauce. If you like a strong kick, feel free to customize the cheese sauce with extra hot sauce or add a generous dash of cayenne. You can use poached or baked chicken or buy a fully cooked rotisserie chicken and shred it for the dish. The panko breadcrumb topping includes some crumbled blue cheese along with parsley for color. If you prefer parmesan cheese, use that instead of the blue cheese, or finish the casserole with a plain buttered breadcrumb topping. This is an excellent dish to make for a party or game day gathering or take it along to a potluck dinner. It will be an instant hit