Slow-Cooker Bratwurst and Sauerkraut Soup

Name: Slow-Cooker Bratwurst and Sauerkraut Soup
Prep time: 30 min
Total time: 30 min
Cuisine: German
Ingredients: 1 pound uncooked bratwurst, cut into 1/2-inch-thick slices; 1 pound tiny new red potatoes, cut into quarters; 2 small onions, cut into 1/4-inch wedges or coarsely chopped; 1 cup sliced celery; 2 cloves garlic, minced; 3 bay leaves; 1 14.5 ounce can Bavarian-style sauerkraut; 2 14.5 ounce cans lower-sodium beef broth; 1 tablespoon spicy brown mustard; 1 tablespoon cider vinegar; 1 teaspoon paprika; 1 teaspoon fennel seeds, crushed; 0.5 teaspoon caraway seeds; Sour cream (optional)