Minecraft wiki entry for Hunger_management, associated text: Advantages:
Pumpkin pie has a high hunger restoration value. Good choice for restoring hunger points before eating something with more saturation.
Can be crafted in the player's inventory, as long as one is carrying the ingredients (pumpkins, sugar and eggs).
Restore 4.8 saturation.
All ingredients required to craft pumpkin pie can be farmed automatically.