How to Avoid Starving to Death!

Food can occasionally be found lying loose on the dungeon floor or tucked inside chests.
Wearing a ring causes you to get hungry much faster! Consider taking it off whenever it isn’t actively needed.
Ring of Slow Digestion causes you to you get hungry much slower (unless it’s cursed!).
Avoid eating the moment you become HUNGRY. Instead, wait until you are STARVING. You can push your luck even further during starvation, but only risk it if your HP is high, as your health won’t regenerate while starving.
Avoid excessive exploration – scout just enough to find the exit and vital resources.
Hegor will gladly sell you food, provided you can pay his price.
Certain uncursed monster corpses can be consumed to satisfy your hunger (check the spoiler section below to see which ones).
Store Goblin corpses inside a bag early on to keep them from decaying.
It is incredibly rare, but monsters will occasionally drop food upon death!

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Eating a cursed corpse near Erizul or a Plinth and reverting to human form will leave you completely satiated.
Stepping onto a hotplate will automatically cook a random corpse in your inventory. While all cooked corpses fully satiate you, there is a distinct chance the corpse will overcook and be completely destroyed instead.
All blessed corpses are guaranteed to satisfy your hunger.
The Wand of Sating completely transforms targeted monsters into edible food!
Uncursed corpses that safely satiate you include: Goblin, Lich, Belph, Midgul, Hegor, Fayora, Erizul, Valac, and Parox.

Hegor’s Blessing allows you to swap any inventory item of your choice for a piece of food. To unlock this, you must doom Hegor; from then on, his gravestone will appear where he once stood to grant the blessing.
You can wish for up to 3 pieces of food.
To guarantee that Hegor summons on the very next floor, light the GREHO white flame!
Every monster is tied to a specific, permanent item (offered referred to as its “vault item”) that never changes between runs. Belph’s dedicated vault item is a piece of food!
Opening a Monster Nest will either spawn the monster itself or its designated vault item. Because of this, a chest inside a Belph Nest will always contain food.
If your deity is pleased with you (piety status is Favoured or Blissful), sacrificing a Belph corpse at an altar will prompt your deity to reward you with its associated vault item: food.
If you manage to unlock the Vault while polymorphed into a Belph, you will find 4 pieces of food waiting inside.