Re:Speaking of Ketchup.
And I grew up in the white bread midwest (Minnesota), just around the time fast foods and interstates were coming in, and we didn't know how bland our diet was, very unlike the ethnic richness available elsewhere. I had moved to Omaha in 1971 (steaks at those places on 72nd Street! and always a bowl of spaghetti included), but I never saw ketchup on potatoes until I moved to Kansas City in 1972 and started eating in some of those greasy spoon places in the East Bottoms that existed for truck drivers.
And a hamburger with lettuce and tomato. Well, that was a California Burger in the early sixties, and can still be found on some Midwest menus today.
I remember Al the restaurant owner in a TV Happy Days segment supposedly set in 1960, after the kids had returned to Milwaukee after a trip to California. "Lettuce and tomato on a hamburger," Al said, "What will they think of next?"