She mixed up English trifle with shepherds pie and served it as a dessert

Reminds me of another language-based food mix-up (try neat url au Poisson here to pomme de terre story http://wordsmith.org/board/showthreaded.pl?Cat=&Board=wordplay&Number=6596), and yes, it again involved my wife's French (and no, she's not). At a dinner party she served a beautiful dessert with "crème fraiche" as a topping. This time, of course, her translation to "fresh cream" was impeccable. The dessert, unfortunately, was unpeckable. Or do I mean unspeakable? Impeachable?