In 3- or 4-quart saucepan, heat oil over medium-high heat. Cook 3 cups onions and the bell pepper in oil 8 minutes, stirring frequently, until tender. Add cumin, oregano and garlic; cook and stir 1 minute. Add drained beans, broth and water. Heat to boiling; reduce heat. Partially cover; simmer 1 hour 30 minutes or until beans are tender. Remove from heat; cool slightly.