In a large heavy skillet, heat the oil over medium to high heat. Add the onion and cook for 3 to 4 minutes, stirring frequently, until golden. Reduce the heat to low, add the garlic and chiles and saute, stirring, for 1 minute more. Do not brown the garlic. Add the mushrooms, epazote, and salt and cover the pan tightly. Cook for 8 to 10 minutes, or until the mushrooms are tender, and serve at once.
c.1997, M.S. Milliken & S. Feniger, all rights reserved