Cut the pork into 1" cubes. Dust with salt, pepper, and pasilla pepper, and let rest for 1 hour. Place the meat in a shallow baking pan in a 300 degree oven for about 2 hours. Pour or siphon off the fat from time to time. Drain on paper towels and serve with Salsa Cruda and/or Guacamole. Makes 25 to 30 carnitas.