Preheat oven to 400°F. Prepare pie crusts according to box instructions. (We used a 9" round cake pan, but you can prepare in pie pan if you wish) Line pan with pie crust.
Prepare chicken in skillet until fully cooked. Season to taste.
Remove chicken from heat. Prepare pie filling in saucepan first melting butter over medium heat. Stir in flour, salt, and pepper until fully blended gradually adding chicken broth. Stir until thickened.
Stir frozen mixed vegetables into filling.
Remove filling from heat. Use fork to poke holes in bottom pie crust. Add chicken filling to pie crust in pan. Place second crust on top, and seal edges. Cut several slits in top crust.
Bake 30 minutes or until crust is brown. If necessary, cover edges of crust with foil to prevent burning in the last 10-15 minutes.
Let stand 5-10 minutes before serving.