Little known fact that I just made up:
The Githzerai make the finest cheeses in the known planes. This is due to the unpredictable effects of Limbo's pure Chaos on the process of fermentation; the Gith cheesemaking process involves repeatedly exposing the milk (of a variety of extraplanar animals, including Celestial, Fiendish, and other templated varieties) to Limbo's natural Chaos, and then to the stabalizing influences of the great Gith monasteries. (Gith cheesemaking is a primarily monastic craft.)
By nature, the results are somewhat unpredicatable, but the Gith cheesemakers have classified thousands of types of cheese. many of the more expensive Gith cheese varieties have magical effects on the eater. (Treat as potions; any Githzerai spellcaster with the Brew potion feat can define the effects of the feat as cheesemaking, with no real mechanical impact.)