Wash and finely chop the potatoes. Dice the steak. Mince the onions and carrots and place all the chopped vegetables into a large bowl along with the steak.
Season with paprika, salt and pepper. Stir in the flour until the meat and vegetable are completely coated.
Preheat the oven to 400 F. Thaw the puff pastry sheets until they can be unfolded without breaking. Once the pastries are soft, use a rolling pin to roll the dough thin.
Cut about six 4-5 inch circles out of the puff pastrie sheets. Set the circles aside and roll out any remaining pastry and cut additional circles, as desired.
Whisk together the egg and water. Spoon 1-2 tablepoons of the meat and vegetable mix into the center of each pastry.
OPEN FACE PASTIES: Wet the exposed edges of the circle wih the egg and water mix. Gently fold the edges of the circles over the filling to create a small pie shape.
CLOSED PASTIES: Wet one side of each circle with the egg and water mixture. Place 1 tablespoon of the filling into the center of each circle. Fold the dry half of the circle over the filling and pinch the edges closed. Poke a small hole in each to vent while cooking.
Arrange the pastries on a baking sheet about 1-2 inches apart. Brush the pastry edges with the egg and water mix again and then bake at 400 F for 10 minutes, then reduce the temperature to 375 F and continue to cook for 1 hour - or until the pastries are golden brown and crispy.
Season the pasties with a sprinkle of sea salt and fresh chopped parsley. Serve before a big Quidditch match or a quiet night in the common rooms. Enjoy!