Arrange the chile pods on a baking pan and place them in a 250 degree F. oven for 10 to 15 minutes, or until the chiles become very aromatic, being careful not to let them burn. Remove the stems and seeds and crumble the chiles into a saucepan.
Cover the chiles with hot water and allow them to steep for 15 minutes to soften. Drain the chiles and discard the water.
Heat the oil in a saucepan and when hot, add the onions and saute until they are soft. Add the garlic and saute for an additional minute. Add the chiles, broth, oregano, and cumin and simmer for 10 minutes.
Place all the ingredients in a food processor or blender and puree until smooth. Strain the mixture for a smoother sauce.
If the sauce is too thin, place it back on the stove and simmer until it’s reduced to the desired consistency, if too thick, add additional broth or water. Adjust the seasonings and serve.