After I went to bed I started thinking that maybe they are not baby squash and looking closer I think they are some kind parboiled tuber. Possibly one to be eaten al dente like Jersualem Artichokes which accounts for the undercooked look.
None of that excuses the carrot though. I can see 7 now.. "a bright color is required to supply a pleasing balance to this dish." Places carrot on plate. Shoving a small dead bird into a vol au vent case is shoddy cuisine, I thought those things vanished with the 80's.