Iguana-on-a-stick

Iguana-on-a-stick, available as a whole iguana or in the form of iguana bits, is an edible food item in Fallout, Fallout 2, Fallout 3 and Fallout Tactics to replenish hit points.

Fallout 3
Iguana-on-a-stick is commonly found throughout the Capital Wasteland, which is weird because there are no iguanas. However their availability may be due to local pet store iguanas getting loose after the Great War. Or possibly Iguanas that have migrated from the west coast and started to breed