2. Roast the tomatillos on a baking sheet about four inches away from the broiler until charred on all sides, about 5 to 8 minutes. Let cool. Chop roughly and reserve with all the juices.
3. Season the pork generously with salt and pepper. Flour it lightly. Heat the oil in a skillet over medium-high heat. Add the pork and brown on all sides. Remove the pork from the skillet and set it in a soup pot. Drain off the excess fat in the skillet.
4. Using the skillet, turn the heat down to medium and add the onion. Cook until soft and translucent, about 5 minutes. Add the Anaheim or poblano chili peppers, green peppers and jalapeno chili peppers and cook 3 to 4 minutes more. Add the garlic and cook 1 minute more.
5. Add the vegetables to the soup pot along with the roasted tomatillos and their juices, hominy, cilantro, oregano and cumin. Cover with chicken stock, bring to a boil, and reduce to a simmer. Cook loosely covered until the pork is very tender, about 1 1/2 hours.
6. Adjust the seasoning with salt and pepper to taste.