Heat olive oil in a large pot over medium-high heat. Add the bell pepper, onion, celery, carrot, and jalapeño pepper. Cook until softened, stirring occasionally, about 10 minutes.
Add the chili powder and cumin; stir and cook for another minute or so.
Add oregano, salt, pepper, beans, tomatoes, and broth. Simmer over low heat for 30 minutes.
Add cooked quinoa, and cook for 15 minutes more. Add more broth as necessary for desired consistency. Chili can simmer for up to an hour, if you like.
Enjoy with toppings of your choice.
Video
Notes
Other types of beans can be substituted for the black beans. A mixture of beans is good, too.
If using regular broth, not low sodium, reduce the amount of salt added.
Leftover chili can be stored in the fridge for up to 5 days or in the freezer for up to 2 months.