Rub salt and pepper into both sides of meat; coat with flour and place in a roasting pan with lid. (cast iron is preferable) Cook in 250 degree oven for 4 hours.
Remove meat to cutting board and cut into 1/2 inch cubes.
Over medium heat bring juices to a fast simmer and add onion, peppers, garlic, cumin, and chili powder. Cook 4 or 5 minutes and add the flour - stirring to keep from lumping. When flour starts to thicken add bouillion.
Add meat, cover and cook in 200 degree over for 45 minutes to 1 hour.