Slow-Cooker Brat and Sauerkraut Soup

In a large skillet, cook bratwurst slices over medium-high heat for 3 to 4 minutes or until browned on all sides, stirring frequently. Remove from skillet and set aside.

In a 4- to 5-quart slow cooker, combine potatoes, onions, celery, garlic and bay leaves. Top with browned bratwurst and sauerkraut. In a large bowl, whisk together broth, mustard, vinegar, paprika, fennel seeds and caraway seeds. Pour into cooker.

Cover and cook on low-heat setting for 6 to 7 hours or on high-heat setting for 3 to 3 1/2 hours. Discard the bay leaves.

If desired, top each serving with sour cream.