HuarachesTo make the huaraches: in a small skillet, heat the lard over low heat. Saute the ancho for 1 to 2 minutes, or until slightly softened. With a slotted spoon, transfer the chile to a blender and add the peppercorns, salt, and water. Blend to a smooth puree. In a large mixing bowl, combine the masa with the chile puree. Knead the dough together well. To test the consistency, flatten a small ball of dough between your palms. If the edges crack, add water to the dough, a Tbsp at a time, until a test piece does not crack. Set the masa aside, covered, at room temperature for 1 hour to allow the flavor to develop. Pull off small pieces of the dough, about 1 tablespoon, and roll them with the palms of your hands into balls about 1 1/4 inches in diameter. Between 2 sheets of plastic wrap, roll or press them out into slightly thick 4-inch round tortillas. Place 1 tablespoon of the cheese on one side of each tortilla. Sprinkle on a little epazote and a pinch of salt. Fold the dough up and over to cover, then press down to seal the edges and make the tortilla evenly flat and about 1/4inchthick. Heat a large comal cast iron comal or griddle over medium heat and brush it sparingly with a little oil. Place as many huaraches as will fit onto the hot pan or griddle. Cook for 1 or 2 minutes on each side, turning over when one side is golden. Set the cooked huaraches aside and finish cooking the remaining huaraches in the same way . Sprinkle each with grated cheese and red onion and serve immediately, accompanied by the dipping sauce.