Well, it isn't Baked Alaska.
Spit-roast turkey Cornbread stuffing Boiled squashWhat is it they have in common, and can you name one other thing that might be served at Thanksgiving dinner that has the same property?
Edit: My hint was a callback to the recent (MOUNT) DENALI puzzle. The food I submitted was the simple CAULIFLOWER.
A: Each food item uses all five vowels (A, E, I, O and U) exactly once. Other possible foods with this property: Whipped young yams, cranberry coulis, pumpkin gelato, robust Zinfandel. Any food whose name contained all five vowels exactly once was accepted.