Take pie crusts out of package. Turn the second tin upside down as it thaws.
While that it thawing mix together in a large bowl the shredded chicken, hashbrowns, peas & carrots, onion (opt) and gravy.
Add salt & pepper to taste.
When pie crust has thawed (15 minutes usually) add pot pie ingredients into pie tin with crust.
Then take the upside down crust and gently place it on top of the pie carefully. Spread it out and pinch the two pie crusts together on the seams.
Poke a few holes with a knife or fork on top of pie.
Cover and FREEZE if you want this as a freezer meal, or place in oven at 350 degrees and cook for 35-45 minutes until top is golden brown and you can hear the inside is bubbling.