How to Make It
Step 1 Braise the Meat
Preheat the oven to 325°. In a medium skillet, toast the ancho chiles over moderate heat, turning, until pliable and charred in spots, about 2 minutes; let cool slightly, then tear into pieces.
Step 2 Braise the Meat
In a large roasting pan, toss the ancho and chipotle chiles with the celery, carrots, onion, garlic and bay leaves. In a large bowl, toss the short ribs with the oregano, cumin and 2 tablespoons of salt. Arrange the ribs over the vegetables in the roasting pan. Add 2 cups of water to the pan, cover tightly with foil and braise in the oven for about 3 1/2 hours, until the meat is very tender.