Over a medium high heat, in a medium-size cast iron skillet, heat the oil until it smokes. Add the whole epazote leaves and fry until they wilt, stirring all the time, about 2 minutes. Add the chile strips and salt and fry about 3 minutes, stirring all the time.
Reduce the heat to low. Stir in the cream and milk. Add the pieces of cheese and cook until the cheese melts.