Chicken Pot Pie Casserole

Ingredients

• 2 chicken breasts and 4 chicken legs
• 12 cups water
• 4 tablespoons unsalted butter
• 5 tablespoons flour
• 3 tablespoons onion (diced)
• 2 tablespoons celery (diced)
• 1 cup carrots (diced)
• 1 1/2 cups whole milk (warmed)
• 4 cups homemade chicken stock (3 cups with mixture, 1 cup on top)
• 2 1/4 teaspoons kosher salt
• 2 cups potatoes (peeled and cut into bite-sized pieces)
• 1/2 cup frozen peas
• 12 ounces sour cream
• 2-3 cups cooked chicken (from the chicken breasts from the stock)
• 1 bag instant cornbread stuffing
• 1/2 cup unsalted butter (melted)