1. In a soup pot, heat the canola oil over medium-high heat. Add the onion, garlic and bell pepper; cook, stirring occasionally, about 3 minutes or until slightly softened.
2. Add the turkey and saute 5 minutes or until no longer pink, crumbling the meat with a spoon as it cooks. Add the beans, tomatoes, tomato sauce, corn, chili powder, cocoa powder and oregano. Bring to a boil. Reduce heat, stir in the chocolate and simmer 15 minutes. Ladle into bowls and serve.