Lou Cifer And The Hellions, Cut My Heart Out

"Within the walled Sacred Precinct of Templo Mayor in the Aztec city of Tenochtitlán, the children tore a dried-out tortilla in half and, with a piece of the sharp end, played the game of dying on the altar. So went the pretend human sacrifice. Franciscan Fray Bernardino de Sahagún, a Spanish missionary in the sixteenth-century New Spain, described the tortilla ritual played by seven children, the chosen ones dedicated to the blue rain god Tlaloc: 'Using tortillas of ground corn which had not been softened in lime as mock hearts, they thus cut their hearts out.'" 
Paula E. Morton, Tortillas: A Cultural History