Cook the chicken breasts until fully cooked, then cut them into small cubes.
Press one of the refrigerated pie crusts into a pie plate.
In a large bowl, combine the cubed chicken, drained mixed vegetables, cream of potato soup, boiled potato cubes, milk, salt, pepper, and Accent seasoning.
Stir until all ingredients are evenly mixed.
Pour the mixture into the prepared pie crust.
Place the second pie crust over the filling and seal the edges.
Add butter to the top of the crust.
Preheat the oven to 375 degrees.
Bake for 40 minutes until the crust is golden and the filling is bubbling.
Allow the pie to cool for 10 minutes before serving.