Since Dragon Fruits are rare, and only restore as much hunger as Berries by themselves, albeit with more health gain, it is better to cook them into Dragonpie, as it will restore a lot more hunger and health than even a cooked Dragon Fruit. Since Dragonpie can easily be made with just Twigs as the filler, it is highly resourceful.
Prepared Dragon Fruit is made by Cooking Dragon Fruit on a Campfire, Fire Pit or Star. It restores significantly more Health and slightly more Hunger than its raw counterpart. It can also be used as an ingredient in several Crock Pot recipes.