Cuban sandwich

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CUBAN SANDWICH--A name, generally confined to Florida, for a submarine or
hero sandwich.  The sandwich, often grilled, seems to have been introduced in
the early 1970s.
---Robert Hendrickson, FACTS ON FILE DICTIONARY OF WORD AND PHRASE ORIGINS

CUBAN SANDWICH n Also _Cuban_ chiefly FL  See Map Section=submarine sandwich.
1965-70 DARE (Qu. H42, The kind (of sandwich) in a much larger, longer bun,
that's a meal in itself)Infs, chiefly FL, Cuban Sandwich, FL37 Cuban.
1967 _AmSp_ 42.283 FL, The Submarien Sandwich...Cuban Sandwich--Miami.
--DICTIONARY OF AMERICAN REGIONAL ENGLISH

     From the WYOMING VALLEY WOMEN'S CLUB (Wilkes-Barre, PA) COOK BOOK
(1925), pg. 139:

     _CUBAN SANDWICHES_
     Between two slices of bread spread with mayonnaise put a thin slice of
cooked chicken, followed by a layer of dill pickle, a layer of sweitzer
cheese spread with prepared mustard and a thin layer of broiled ham.  A man's
sandwich.
     _Mrs. S. M. Wolfe_