Demoiselles is a southwest France speciality, with a pretty name that means ‘young ladies’ (as in Picasso’s revolutionary Demoiselles d’Avignon, although the young ladies in the painting probably weren’t French but were prostitutes on Carrer d'Avinyó in Barcelona).
Down in southwest France, demoiselles are carcasses of fattened ducks grilled on a wood fire, for messy picking and sucking the meat off the bones. You’re far more likely to see them on special occasions (summer fêtes etc) rather than on a restaurant menu.
Image by exidieul