Rub half of the seasoning mix on the pork loin. Place the pork loin into a hot skillet or sauce pan. Pour half the bottle of beer into the pan. Cook over medium high heat for 2-3 minutes and then flip the pork loin over.
Remove the pork loin from the the pan and place in a crock pot. Pour any remaining beer into the bottom of the pan to remove any meat or flavor bit. Then pour the beer into the crock pot with the meat. Sprinkle the remaining seasoning over the meat as well. Cover and cook on low for 6-8 hours.
With an hour remaining to cook. Cut up meat or pull it apart with fork while in the crock pot. Stir peppers, onions and garlic into the meat and cook for another hour on low.