Follow directions on back of frozen meatball package to defrost them. Usually just takes a few minutes in the microwave to make them tender.
Add all other ingredients into your slow cooker and whisk together. Pour in warm defrosted meatballs and toss so each is coated well with sauce.
Cover with lid and set to high heat for 3 hours. Serve! If leaving in pot for several hours change to keep warm setting and leave lid on. Provide toothpicks on the side for people to enjoy throughout the next few hours.