Start by melting the butter over low heat.
Add your vegetables (minus the potatoes) and cook them until the veggies are tender. Add your garlic and other seasonings before mixing in your flour.
Add the remainder of your ingredients.
Cook until the chicken and potatoes are both fully cooked and tender.
Shred the chicken before serving, or, if you want, you can shred it before adding it to the stew.
You can add other vegetables to this, too, if you want, like sweet potatoes, mushrooms, red peppers, or green beans. I added some sweet potatoes just for an extra dose of healthy nutrients (plus sweet potatoes taste great!).