Braised Short Ribs with Arbol Chiles, White Beans, Mushrooms and Beer - Rick Bayless

Ingredients

• 8 arbol chiles
• 2 tablespoons olive or vegetable oil
• 4 pounds (8 good-size pieces) bone in beef short ribs
• Salt and freshly ground black pepper,
• 1 large white onion, cut into 1/2-inch pieces
• 8 ounces full flavored mushrooms (think shiitakes here), stemmed and quartered
• 2 cups full-flavored beer (I like Negra Modelo)
• 2 cups beef broth
• 1 head garlic, cut in half across the center
• 3 sprigs fresh thyme
• 1 14.5-ounce can diced tomatoes in juice (preferably fire-roasted)
• 4 cups white beans (homemade or canned - you'll need three 15-ounce cans), drained