Cooked Porkchop

Grilled Pork is the result of cooking raw Pork in the Furnace. Grilled pork restores 4 Hearts.

Grilled pork is often considered the easiest form of food to obtain. Seeing as it does not require luck (to find mushrooms), a well lit base is always full of pigs, and the pigs themselves can drop 2 Pork.

The Stacking Glitch
In the current Indev version of the game it is possible (due to a bug) to stack grilled pork when you keep it in the slot of the furnace.

Once you split the stacks, you cannot join them any more. Although you can drag a stack of Grilled pork in your inventory back into the furnace and then cook additional pork and it will successfully stack. This method may result in stacks larger than 64, although your inventory will not accept stacks larger than that amount.

It is generally viewed as a bug because food being unstack able is a convenient way to keep the game difficult (making it hard to heal on the fly). It is unknown if this bug will be fixed or if healing will be altered to compensate for this bug-turning-feature.