I'm with Lady P on "Fly's graveyard"[1], it's an Eccles cake.
What about "Frog Spawn" = Semolina (Cream of Wheat for 'merkins?).
Then there's "Corned Dog" or "Fanny Adams", both old (service) names for Corned Beef (oh and "Choke dog" for hard tack biscuits)
As for the French "Croque Monsieur", there is a similar "Croque Madame" (this one has cream and eggs added to the mix, I believe).

Regards

Walrus

[1] I can't spell cemetery either.