Heat the apples, cinnamon, sugar, vanilla, and water on medium heat for approximately 8-10minutes until the apples are cooked.
Slice the puff pastry dough into 12 equal-sized squares..
Take the dough and shape it to fit snugly into each cup of a greased muffin tin, making sure to cover the top completely. Utilize the extra dough to create decorative pie toppings such as heart shapes, leaves, or thin strips fora lattice design.
Scoop the cooked apples into each muffin cup, and pour the sauce into each cup, filling it up to about ¾ of the way.
Place a cut-out puff pastry shape on top of each pie and then use the egg wash to brush them.
The recommended cooking time for this recipe is 18 to 20 minutes at a temperature of 400 degrees Fahrenheit.