Gather your ingredients. These should be your left overs
Preheat your oven to 350°
Butter your pie dish
Place your pie dish on a parchment lined sheet pan.
In that pie dish place your 2½ cups of stuffing.
Using a spoon, flatten your stuffing all around your pie dish and up the sides.
Bake for about 15 minutes until golden brown.
Take out of the oven and set aside.
Go ahead and adjust the oven temp to 400°
Put a sauté pan on your stove top on medium heat.
In that pan place 2 cups of Turkey, 1 cup of gravy and 1 1/2 cup green bean casserole.
Mix well until warmed through until well incorporated.
Once warm, place on top of your crust.
Place your desired amount of mashed potatoes on top of your filling. Use as much or as little as you want. Some like a thick layer while others like a thin layer
Sprinkle your French's Fried Onions on top of your Garlic mashed potatoes.
Place the entire pie in your oven until completely warmed through and the onions have a nice golden brown. This should take about 15 minutes. But always keep an eye on it.
Set aside for about 5 minutes to let your pie cool off.