In a shallow dish mix the flour with seasoned salt and pepper.
Dredge the pork cubes in the flour mixture.
Heat oil in a Dutch oven and brown the pork cubes.
Add in the chili flakes (if using) broth, tomatoes with juice, green chilies with juice, onions, garlic, cumin, oregano; bring to a boil, reduce heat and simmer over medium-low heat (uncovered) for about 1-1/2 hours (season with salt and pepper to taste).
Add in the black beans and corn; simmer for about 20-30 minutes.
Spoon the mixture down the center of each tortilla, then sprinkle with shredded cheese and chopped green onions.