I seem to remember a particular ancient Greek myth that used to explain how animal sacrifices to the Olympian gods were performed. In particular, when poultry or mammals was sacrificed, the humans would keep the meat of the animal to them, and burn the less tasty parts (skins, fats, and entrails) for the gods to smell. I cannot find this myth now.
What myths describe the general procedure of sacrifices to the Olympian gods, as in, what goods should be sacrificed and how, and give the mythical origin explaining these habits?