Slow Cooker Chicken Wild Rice Soup

4 carrots, peeled and chopped
1 large zucchini, chopped
1 lb boneless, skinless chicken breasts, cut in half if large
1 tbsp butter
1/2 teaspoon dried herbes de Provence or dried thyme
1 bay leaf
4 cups chicken broth
1 cup water
3/4 cup wild rice-brown rice blend (I use Lundberg)
2 egg yolks (optional)
2 tsp garlic-infused or regular olive oil
1 small leek, green parts only, sliced
3 tbsp lemon juice (from 1 lemon)
Salt and black pepper to taste
Grated parmesan cheese for serving
Chopped fresh Italian parsley for serving

1. Add all ingredients through rice to a large slow cooker and cook until chicken breasts are opaque in the thickest part (165F on an instant-read thermometer) and rice is tender, 4 hours on high, or 8 hours on low.  Transfer chicken breasts to a cutting board.

2. In a small bowl, whisk the egg yolks. Slowly pour about ¼ cup of the hot soup into the yolks as you whisk (this heats up the yolks so they don't start to scramble when you add them to the hot soup). With the slow cooker on high, slowly pour the yolk mixture into the soup, stirring as you pour. Cover the slow cooker and cook on high for 10 minutes.

3. Heat the garlic oil in a skillet on medium heat. Add leek, season with salt and pepper, and cook until tender, 6 to 8 minutes. Shred the chicken and add it back to the slow cooker along with the leeks. Cover and cook for a few minutes, just until chicken is heated through. If soup is very thick, add water or broth (I added about ½ cup) to thin as you like. Turn off slow cooker and stir in the lemon juice. Season to taste with salt and black pepper. Ladle into bowls and top with Parmesan and fresh parsley.

Source: https://calmbellykitchen.com/blog/slow-cooker-chicken-wild-rice-soup