Preheat oven to 425 degrees
Roll each of the two piecrusts using a rolling pin on a lightly floured surface, shaping it vertically into a 14" oval
Trim and discard rounded ends of each piecrust, then using a sharp knife, cut each crust into 6 - 4 inch rectangles (squares). Use a patterned rolling pin on one side if desired.
Place 6 of the squares on the parchment lined baking sheet
Whisk together the egg with (half) the salt (1/8 tsp) plus 1 teaspoon water in a small bowl
Spoon 1 tablespoon plus 1 teaspoon of apple butter in the center of each square, smoothing it out with the back of a spoon but leaving about an inch of space around the edges
Brush edges of the pastry with some of the egg mixture using a pastry brush or your fingers, then top each one with the remaining piecrust squares one at at time, pressing the edges lightly with a fork or back end of a spoon to seal the crusts together to make 6 hand pies
Refrigerate the apple hand pies for 30 minutes
Remove from fridge and brush the tops of each hand pie with the remaining egg mixture
Sprinkle the top of each hand pie with a teaspoon of sugar
Cut a small line in the middle of each pastry to allow steam to escape while baking
Place in hot oven and bake for 20-25 minutes until golden brown. Cool on wire rack for about 15 minutes.
Whisk the powdered sugar, maple syrup, remaining 1/8 teaspoon of salt, and 1 tablespoon milk together in a medium sized bowl. Add the apple butter and whisk with a fork until smooth
Drizzle the glaze on top of each hand pie and sprinkle with sliced almonds