Heat oil in a cast-iron skillet over medium heat. Add the scallion, onion, pepper, and black beans and cook for 5 minutes, stirring frequently. Add the garlic, cumin, chili powder, salt, and pepper and continue to cook for 2-3 minutes.
Heat oil in a cast-iron skillet over medium heat. Add the scallion, onion, pepper, and black beans and cook for 5 minutes, stirring frequently. Add the garlic, cumin, chili powder, salt, and pepper and continue to cook for 2-3 minutes.