This oh-so-easy recipe is really as simple as it comes. It basically utilizes all of the ingredients of a traditional chili dog, yet adapts it effortlessly for the casserole dish, combining hot dog buns, hot dogs, sweet red onions, sharp mustard, chili and cheddar cheese to create the dinner casserole that you've been dreaming of! Ready and on the dinner table in a mere 40 minutes, this dinner delight will knock you off your feet!