Preheat oven to 400°
In a large bowl add apple slices, lemon, sugar, flour, cloves, nutmeg, cinnamon, and vanilla. If you've decided to use the chopped walnuts, add them during this step.
Fold together all ingredients with a spatula until well combined. Fill the two pie pans with the apple mixture (inside of the crust that has been blind baked).
Drizzle 1/4 cup of caramel into each pie (You'll want to save the rest of the caramel to drizzle over individual slices. Trust me, this will be amazing.)
Carefully place the uncooked circles of dough over the top of the pie and crimp the top crust along the rim of the pie pan. With a sharp knife cut four slices (1 inch each) into the center of the pie crust, an equal distance from one another.
Mix the egg and milk to make the egg wash.
With a baker's pastry brush (my preference is the silicone variety) or with a napkin rolled tight, dip into egg mixture and gently wash the top of the crust on both cutie pies.
Sprinkle some turbinado sugar on the crust.
Place pies onto a baking sheet and then into the oven.
Bake for 40-45 minutes until the apple mixture is bubbling.
Set pies out to cool for an hour or two.Be sure to use your caramel reserves for extra drizzles.