Heat half a cup of water in a large pot and add the onion and cumin seeds. Cook over a high heat stirring frequently for 3 to 5 minutes or until the onions are soft. Cook the brown rice as per the packet interactions.
Stir in the green pepper, garlic and half a cup of the remaining water. Turn down the heat and cook for 3 minutes stirring occasionally. Add the tomatoes, chilli powder and the remaining cup of water. Cover and simmer for 5 minutes.
Add all of the beans and cooking liquid. Cover loosely and simmer for 15 minutes.