Season ground beef with half the salt and pepper, then form into 1-tbsp-size meatballs.
Slice cabbage into thin strips.
Add chicken breasts, meatballs, diced tomatoes, cabbage, seasonings, and stock to the slow cooker.
Cook on low for 7–8 hours or high for 4–5 hours.
Remove chicken and shred with two forks.
Return chicken to soup and stir to combine.
Serve hot with toppings like avocado, lime, cilantro, sour cream, and cheese.
See full steps with tips & photos → https://theboatshedcafe.com/cabbage-roll-soup-with-chicken-and-beef/