I ask, because my nominee is in the oven right now.
In our house it was called "Chicken with Crumbs." Mom's peers called it "Londoff Chicken," which could be an homage to Johnny Londoff's Saint Louis car dealerships. I know it wasn't local; it must have been printed on Pepperidge Farm stuffing bags.
Layer chicken breasts, swiss cheese, cream of chicken soup, Pepperidge Farm herb stuffing, and melted butter. Bake at 350, and I didn't even have to look that up because every casserole bakes at 350, it is the RULE.
The key to the recipe is the butter delivery system: the stuffing, or "dressing," or crumbs. Once we had a special dinner of "Chicken with Crumbs" served with "Green Beans with Crumbs" with a side of "Crumbs."
Now, others may say the tuna-noodle casserole with the "croute" of potato chips is the ultimate casserole, yet think of how many people don't like fish. (And I think we can all agree, we are talking the classic tuna-noodle casserole: egg noodles, can of tuna, can of cream of mushroom soup, topped with potato chips. This is the standard.)
Chicken with Crumbs has this Queen's Royal Warrant as the ultimate casserole. It says "suburbs!" What do you think? What would you nominate?
P.S. I define "casserole" as something mixed with something, maybe some other somethings, plus Campbell's Cream of Something soup, that you then bake at 350. Mac and Cheese with hot dogs cut up in it? Not a casserole.