1 Guajillo Chile
2 Ancho Chiles
1/2 Onion , diced
4 large Roma (Plum) Tomatoes
1/2 tsp. ground Cumin
1/4 tsp. Black Pepper
1/4 tsp. Oregano
2 Tbsp. Vegetable Oil or Lard
1.) Wash, stem and seed the chiles. Toast the chiles until aromatic and puff up slightly. Place in a bowl and cover chiles with hot water and soak for 30 minutes. Remove chiles and place in blender with tomatoes. Puree.
2.) Heat oil or lard in a large pan over medium high heat. Sauté onions and spices and cook until aromatic. Add tomato mixture to pan and sauté for 2 minutes. Transfer back to blender and puree.