Cook chicken breasts using your preferred method - grill, bake, or boil until fully cooked. Cut into small cubes and set aside.
Preheat oven to 375°F.
Place one pie crust into pie plate, pressing down until it fits snugly.
In a large bowl, mix together cubed chicken, drained mixed vegetables, cream of potato soup, cooked potato cubes, milk, salt, pepper, and Accent seasoning.
Pour the chicken mixture into the prepared pie crust.
Place the second crust on top of the filling.
Flute the edges to seal the crusts together.
Place small pieces of butter on top of the crust.
Bake for 40 minutes until crust is golden brown.
Remove from oven and let cool for 10 minutes before serving.