Next, saute your onions, garlic and bell peppers. Pour your bottle of beer over the meat in the crock pot and then add your sauteed vegetable. Next, add the rest of your ingredients. No need to cut up the chipotle or serranos as they break down while cooking. Cook this on low and slow for 8 to 10 hours.
Serve in warm flour tortillas with shredded cheese and a small dollop of sour cream if desired or a squeeze of lime and fresh cilantro.
(This is a thick stew, so if it's not thick enough add a mixture of flour and water.)