Looks like the 3 shifts of ladies who cooked for my early-60s Mt Prospect HS, in Chicago NW Suburbs. Pretty darned good grub except for that Friday “Tuna Casserole”. They added “fish sticks” as an option, and I still don’t know what those things are.
Hot dogs, sausages, Spam, compressed meats... best not to think about what’s in ‘em; just cook and eat.