Heat the water in a large pot and add the onion, pepper, garlic, oregano and cumin. Cook over a medium heat for about 5 minutes until the onion is soft. Cook the brown rice as per the packet instructions.
Add the beans, tomatoes, stock, corn, crushed red chilli and sauce. Cover and stir occasionally for about 20 minutes or until the mixture has thickened.
Spoon the chilli into warm bowls an serve with the brown rice.