In a medium pan, heat one tablespoon of oil. When hot, added one tablespoon cumin seeds and stir for 30 seconds until seeds start to brown. Add one large, diced onion and stir for 3-5 minutes until the onion starts to become translucent.

Pour the pan contents into a crock pot or other slow cooker. Add the beans, tomatoes, bell peppers, cayenne, and black peppers. Mix well then let slow cook for two hours.