INSTRUCTIONS
1. Heat a non-stick skillet over medium heat. Add the sausage and cook, using wooden spoon to break the meat into small pieces as it browns, about 5 minutes.
2. Add the onion, carrot, celery, garlic and pepper flakes.
3. Cook, stirring, until the vegetables soften, 2-3 minutes.
4. Transfer to a slow cooker and add the broth, tomatoes, white beans, bay leaves and black pepper to taste.
5. Cover and cook on high for 4 hours or on low for 8 hours.
6. Discard the bay leaves, add the kale and Pecorino Romano and cook until the kale is wilted, about 30 minutes.
7. Serve hot.