She says it is a cure for stomach problems not a recipe for food. Only certain kinds of dirt were used. This makes sense. Certain minerals in the right kind of dirt could help may stomach problems. The special dirt I mentioned is actually a special kind of mold that grows on Mesquite trees.
Many molds have medicinal value.
Penicillin is a mold used to cure infections. My informant says her mother used to use the mold for badly upset stomachs because they were too poor for a doctor and it worked. Here is another favorite dish. Where there was water and fish, they would catch a fish. Instead of eating the fish they would set the fish on a rock in the sun for several days.