in our previous post the dwarven taste for rat was mentioned. A few other items of food and drink are noteworthy as well...
Gruznuk, or Orcish Death Spirit
Orcs are horrible cannibalistic creatures, and love alcohol, so it's probably no surprise that their most famous beverage is actually made from fermented internal organs, usually the livers of the brewer's enemies. The stuff is horrific, almost undrinkable to any non-orc, and even for orcs it can occasionally be lethal. The orcs see this as a plus, though. If a drinker is slain by a bottle of gruznuk, his internal organs are removed, fermented, and then poured back into the bottle, and the defeated orc's name is added to the label. Besting a bottle that has defeated all prior drinkers is considered a heroic feat by the murderous greenskins.
An attempt by wizards to make light and easily portable rations for long journeys, this was once normal food that has had its very physical existence removed, making it a good deal lighter. In fact, it typically appears to be a completely empty paper bag. It is made edible by adding any kind of solid material to the bag, which turns into the specified kind of food.
...Usually. Live frogs are still technically food, right?