In a large skillet, cook beef and sausage over medium heat until meat is no longer pink; drain. Transfer to a 5-qt. slow cooker. Stir in the remaining ingredients. , Cover and cook on high for 4-5 hours or until vegetables are tender. If desired, serve with shredded cheese, chopped onion and sour cream., Freeze option: Before adding toppings, cool chili. Freeze chili and toppings separately in freezer containers. To use, partially thaw in refrigerator overnight. Heat through in a saucepan, stirring occasionally and adding a little water if necessary. Sprinkle with toppings.