Ingredients

  • 1/2 oz dried New Mexican chiles (2 to 3)
  • 2 garlic cloves, left unpeeled
  • 1 teaspoon cumin seeds
  • 1 (14- to 15-oz) can stewed tomatoes including juice
  • 3/4 teaspoon salt
  • 1 lb large boiling potatoes
  • 1 onion, finely chopped
  • 1 tablespoon olive oil
  • 1/2 lb hot or sweet Spanish chorizo (spiced cured pork sausage), finely chopped
  • 8 large eggs
  • 1 1/2 cups heavy cream
  • 3/4 teaspoon salt
  • 1/4 teaspoon black pepper
  • Special equipment: a shallow 2- to 2 1/2-quart ceramic or glass baking dish

Method

  • Heat a dry heavy skillet (preferably cast-iron) over moderate heat until hot, then toast chiles, pressing down with tongs and turning occasionally, about 1 minute.
  • Transfer to a bowl.
  • Toast garlic in skillet, turning occasionally, until softened and slightly charred, about 5 minutes, then transfer to bowl.
  • Toast cumin in skillet, stirring, until fragrant and a few shades darker, about 30 seconds, then transfer to a blender along with tomatoes and salt.
  • Discard stems and seeds from chiles and add to blender.
  • Peel garlic and add to blender.
  • Puree until smooth.
  • Preheat oven to 325F.
  • Peel potatoes and cut crosswise into 1/8-inch-thick slices.
  • Cook potatoes in a 2- to 3-quart saucepan of boiling salted water until just tender but not falling apart, about 8 minutes, then drain in a colander.
  • Arrange slices, overlapping, in oiled baking dish.
  • Cook onion in oil in a large heavy skillet over moderate heat, stirring, until softened, about 5 minutes.
  • Add chorizo and cook, stirring, until chorizo is heated through, about 5 minutes.
  • Spoon mixture evenly over potatoes and top with 1 cup sauce, spreading evenly.
  • Whisk together eggs, cream, salt, and pepper until combined well and slowly pour into dish.
  • Bake in middle of oven until custard is just set in center, 35 to 45 minutes.
  • Let stand 5 to 10 minutes before cutting.
  • Serve remaining chile sauce on the side.