Heat oil in a large pot over medium heat. Add onion and bell pepper; cook and stir until tender, about 5 minutes.
Stir in garlic; cook for 1 minute.
Stir in black beans, tomatoes with green chilies, vegetable broth, green chilies, chili powder and cumin. Bring to a boil; reduce heat to low and simmer for 15 minutes.
Serve hot.
Notes: For an even heartier soup add 1/2 cup of cooked rice or quinoa.