Brown the Sausage: In a skillet, brown the Italian sausage over medium heat until cooked through, breaking it into small pieces. Drain any excess fat.
Add Ingredients to Slow Cooker: Transfer the cooked sausage to your crockpot, and add the chopped onion, minced garlic, diced potatoes, chicken broth, and salt and pepper. Stir well to combine.
Cook on Low: Set your crockpot to low and let it cook for about 6-8 hours, or on high for 3-4 hours, until the potatoes are tender.
Add Kale and Cream: About 15-30 minutes before serving, stir in the chopped kale and heavy cream. Allow it to heat through.
Taste and Adjust: Before serving, taste for seasoning and adjust as needed. You can add more salt or pepper if desired.
Serve and Enjoy: Ladle the soup into bowls, and enjoy it with a slice of crusty bread for the ultimate experience!