In a 4-quart Dutch oven cook ground beef, onion, sweet pepper, and garlic until meat is brown and onion is tender; drain fat. Stir in beans, diced tomatoes, corn, tomato sauce, chile peppers, chili powder, oregano, cumin, and black pepper. Bring to boiling; reduce heat. Simmer, covered, for 20 minutes, stirring occasionally.
If desired, serve with sour cream, avocado, shredded cheese, and/or tortilla chips.