In a large bowl, combine the beans, tomatoes, onion, green pepper, chipotle peppers, adobo sauce and garlic. In another bowl, combine the beef, cumin, oregano, salt and pepper., Pour half of the tomato mixture into a 4- or 5-qt. slow cooker; add the beef. Top with remaining tomato mixture. Cover and cook on low for 7-9 hours or until meat is tender. Serve with toppings of your choice. Freeze option: Before adding toppings, cool chili. Freeze chili in freezer containers. To use, partially thaw in refrigerator overnight. Heat through in a saucepan, stirring occasionally and adding a little broth if necessary. Sprinkle with toppings.