According to Wikipedia, to make an earth oven you need to dig a hole, make a fire in the hole, let the fire smolder, put your pork chops in it, and cover. You might recognize the technique from your last New England clambake, or Hawaiian luau, or Maori hangi, or Fijian lovo, or Cook Island umu.

Scientists today worry the Earth itself is an earth oven.
Photo: woodleywonderworks via Flickr (CC)

