Dear dxb: I am equally unfamiliar with implications of "chopped liver', except that I doubt
that many in U.S. would regard it as a delicacy. I still remember when it was discovered
that raw chopped liver would greatly benefit victims of pernicious anemia. Taken with ice
cream it was dramatically therapeutic. Now the idea of chopped liver inciuces instant nausea.
But I am not an initiate of the mysteries of the current use of the phrase.

Incidentally, liver used to be considered a delicacy. I thought "offal" referred only to the
less appetizing left overs - the guts,glands, and worse. Which reminds me of having read
somewhere that sailors long ago had discovered that eating the bilge rats would cure
scurvy. Rats can synthesize vitamin C in their adrenals, apparently. Yum, yum.