Heat up the olive oil in large sauce pan. Add the carrots, red pepper, onion, and garlic and saute for 5 minutes. Set aside.Add the ground beef to the vegetables and cook for about 8-10 minutes or until completely brown. Make sure to break apart the meat as it cooks. Drain some of the grease off if desired. Stir in the corn flour, chili powder, oregano, and cumin and cook 2-3 minutes longer.Stir in the salt, brown sugar, crushed tomatoes, kidney beans, Dr. Pepper, and chipotle peppers. Heat over medium heat until it is thoroughly heated through and the flavors blend together. Serve with cheese, sour cream, and corn chips if desired.