Turn on the broiler
Set the tomatillos or green tomatoes on a rimmed baking sheet and slide them under the broiler
Cook them, turning often, for 5 to 8 minutes or until they are charred
Set them aside to cool.
Chop the tomatillos or tomatoes, reserving all the juices.
Sprinkle the pork with the salt and pepper. Dust it with flour.
In a large skillet, heat the oil
Add the pork and brown it on all sides.
Remove the pork from the skillet and transfer to a soup pot.
Using the same skillet, turn the heat to medium and add the onion
Cook it for 10 minutes, stirring often, until it is soft
Add the chili and bell peppers
ook them, stirring often, for 4 minutes
Add the garlic and cook for 1 minute more.
Stir in the hominy, cilantro, oregano, cumin, chicken stock or water, and the tomatillos or tomatoes and their juices
Bring to a boil, lower the heat, and simmer, partially covered, for 1 1/2 hours or until the pork is tender.