Preheat oven to 350 degrees. Divide turkey, veggies, onion, and garlic in half and add to two 8-inch pie or cake pans.
Add gravy to each pan then sprinkle in black pepper. Mix pie filling ingredients together in each pan.
Top each pan with one pie crust and pinch or tuck in the edges of each. Cut four slits in the center of each crust and brush with egg.
Bake each pie for about thirty minutes or until crust is golden brown.
Let pies set for about thirty minutes before cutting. Cool completely before freezing.