http://www.thekitchn.com/feedburnermain
What constitutes a casserole? Is it the dish itself, or what it contains? Is it both?
Dictionary.com defines a casserole as two things: a baking dish of glass or pottery, usually with a cover, and also any food (usually a mixture) cooked in such a dish. For all intents and purposes, defining this around-the-world staple is a bit like asking Which came first: the chicken or the egg?