Ingredients

  • 3 ounces dried whole New Mexico chiles
  • 4 cups boiling water
  • 2 tablespoons fine dry bread crumbs
  • 1 1/2 tablespoons vegetable oil
  • 1 garlic clove, minced
  • 1 teaspoon dried oregano, crumbled
  • 1 tablespoon cider vinegar
  • 2 teaspoons salt
  • 3 large onions, chopped (4 cups)
  • 3 tablespoons olive oil
  • 12 (5-inch) white or yellow corn tortillas
  • 3/4 pound white sharp Cheddar, coarsely grated (5 cups)
  • 1 (6-ounce) can pitted black olives, sliced

Method

  • Rinse chiles and split open, discarding stems, seeds, and ribs.
  • Heat a dry well-seasoned cast-iron skillet over moderate heat, then toast chiles in batches, turning them, about 30 seconds total.
  • Transfer to a heatproof bowl and pour boiling water over them.
  • Cover bowl and soak chiles, stirring occasionally, until softened, about 15 minutes.
  • Reserve one fourth of soaking liquid, then puree chiles with remaining liquid in a blender until smooth (use caution when blending hot liquids).
  • Pour pureethrough a fine sieve into a bowl, pressing on solids.
  • Whisk in reserved soaking liquid.
  • Toast bread crumbs in oil in a 2-quart heavy saucepan over moderate heat, stirring constantly, until pale golden, about 1 minute.
  • Add garlic and oregano and cook, stirring, until fragrant, about 1 minute.
  • Stir in chile puree, vinegar, and salt and simmer, stirring occasionally, until slightly thickened, about 25 minutes.
  • Preheat oven to 350F.
  • Cook onions in oil in a 12-inch heavy skillet over moderately low heat, stirring occasionally, until softened, about 20 minutes.
  • Spoon half of chile sauce evenly over bottom of a lightly oiled 13- by 9-inch (3-quart) baking dish, then cover with 4 tortillas, overlapping slightly.
  • Sprinkle tortillas evenly with one third of cheese, then half of onions and olives.
  • Repeat layering with another 4 tortillas, another third of cheese, and remaining onions and olives.
  • Top with remaining 4 tortillas, sauce, and cheese.
  • Bake, uncovered, in middle of oven until cheese is melted and bubbling, about 25 minutes.