How to Make It
Rinse and sort black beans. Heat oil in a large skillet over medium-high. Add onion, bell pepper, and, if desired, bacon. Cook, stirring occasionally, until onions are tender, about 8 minutes. Add garlic, and cook, stirring often, until fragrant, about 30 seconds.
Transfer onion mixture to a 6-quart slow cooker; add beans, jalapeño chile, chicken broth, salt, brown sugar, cumin, pepper, and chopped oregano. Cover and cook on LOW until beans are tender, about 6 hours.