Directions

1. To toast spices (coriander, cumin), place spices in a dry skillet. Heat and stir over medium heat until fragrant. Immediately remove spices from skillet. Combine ancho chile powder, paprika, coriander seed, cumin and salt in small bowl; set aside.
2. Cut 2 large pieces of plastic wrap. Place plastic wrap pieces on work surface in a cross position. Place roast on top in the center. Rub 2 teaspoons of oil on top of roast; spoon and pat half of the spice mixture on top. Carefully turn over roast on plastic wrap. Rub 2 teaspoons of oil on top; spoon and pat on the remaining spice mixture. Tightly wrap pork in the plastic wrap. Refrigerate for 8 to 12 hours.
3. Preheat oven to 300° F. Add the remaining 2 tablespoons of oil to a 6-quart heavy Dutch oven. Heat over medium-high heat.