Slow Cooker Creamy Chicken and Wild Rice Soup

INGREDIENTS

2 tsp

extra-virgin olive oil

medium carrots, peeled and 1/4-inch diced (about 2 cups)

medium celery stalks, 1/4-inch diced (about 1 cup)

small russet potato, peeled and 1/4-inch diced (about 1 cup)

1/2

medium yellow onion, diced (about 1/2 cup)

teaspoons poultry seasoning

1/2 tsp

kosher salt, plus additional to taste

1/4 tsp

black pepper, plus additional to taste

cup uncooked wild rice (or whole grain wild rice blend)

1 1/2 lb

boneless, skinless chicken breasts (about 3 medium breasts), trimmed of excess fat

to 6 cups low-sodium chicken stock, divided

2 tbsp

unsalted butter

1/3 cup

all-purpose flour

2 3/4 cups

2% milk, plus additional as needed