I’ve never used the slow cooker for this recipe, but I would imagine that it could happen. You would need to make sure that you cook the meat and drain off any excess grease before adding to the crockpot. You could then add the cooked meat and the rest of the ingredients into the crockpot to cook on high for 4 hours. I wouldn’t add the rice into the crockpot, but rather make that separately and serve it in the bowl with the soup.