Slow Cooker Chicken, Bacon, and Potato Soup

INGREDIENTS

center-cut bacon slices, diced

1 1/2 lb

bone-in chicken thighs, skinned

2 tsp

salt-free garlic-and-herb seasoning blend (such as Mrs. Dash)

2 cups

thinly sliced leek (from 2 large leeks)

1 cup

sliced carrot (from 2 large carrots)

1 cup

sliced celery (from 2 large stalks)

4 cups

unsalted chicken stock (such as Swanson), divided

3/4 tsp

kosher salt

1/2 tsp

freshly ground black pepper

thyme sprigs

12 oz

baby potatoes

2 cups

coarsely chopped baby spinach