Peel the apples and chop them into thin slices. Place the apple slices in a medium bowl. Add the brown sugar, vanilla, lemon juice, flour, salt, 2 tablespoons of melted butter, and the cinnamon.
Divide the apple filling between the 10 pie crusts. Then place the remaining circles of dough on top of the pies, and use a fork to seal the pie crust in place.
Bake the pies for 25 minutes. Then remove from the oven and brush with 1 tablespoon of melted butter. Return the pies to the oven for 10 minutes letting them become golden brown.