Salt and pepper the chicken on both sides.
Drizzle evoo in a dutch oven or soup pot. Heat over medium heat.
Add the chicken and sear on both sides working in batches to avoid overcrowding. Chicken should cook at least 2-3 minutes on each side, don’t be concerned if it’s not fully cooked when removed. Remove and set aside.
Add the onion, carrots and celery cooking until softened and onions are translucent. Add the garlic and cook an additional 30 seconds.
Sprinkle in the flour, and stir to combine. Allow this to cook for 2-3 minutes.
Pour in the chicken broth and stir until flour mixture is well incorporated. Add in the seasonings: ground sage, dried thyme, dried parsley, and stir together.
Add the chicken and potatoes into the pot. Add the bay leaf. Heat over medium heat, bringing the soup to a simmer. Cover and allow to cook for 15-20 minutes until the potatoes are softened and the chicken registers an internal temperature of 180 degrees F.
Remove the chicken, chop or shred and return to the soup.
Pour the milk in and stir. Taste and adjust seasonings as needed.
Serve topped with fresh herbs as desired.