Allow your pie dough to sit out on the counter at room temperature for 20 minutes. Make sure to check the package for specific instructions. Line a large baking sheet with parchment paper, then place a sheet of parchment on your work surface. Unroll the first pie dough carefully and place it on your parchment-lined work surface.
Using a 3-inch round cookie cutter, cut 8 rounds out of the dough. Carefully remove the excess dough and set it aside.
Spoon 1 to 1 scant tablespoons of jam onto the center of 4 of the dough rounds.
Crack the egg into a small bowl and scramble it with a fork until the white and yolk are fully incorporated. Use a pastry brush to brush the egg wash around the outer edge of each round of dough that has jam on it.
Place the remaining rounds of dough over those with jam, gently pressing around the edges. Use the tines of a fork to crimp around the outer edges of each hand pie in order to seal both pieces of dough together.
Repeat this process with the remaining pie dough from the package. Place all of the formed pies on your parchment-lined baking sheet, leaving at least an inch between them. Put the baking sheet in the fridge to allow the hand pies to chill for 30 minutes. This will help them hold their shape in the oven. While the hand pies are chilling, preheat your oven to 450 degrees.
After 30 minutes of chilling time, remove the hand pies from the fridge. Use the pastry brush to brush the egg wash onto the tops of each hand pie, then sprinkle with some of the granulated sugar.
Using a paring knife, carefully cut an X into the top of each hand pie. You want to cut through just the top piece of dough.
Bake the hand pies in your preheated 450-degree oven for 8-10 minutes or until golden brown. Cool the pies for at least 10 minutes before enjoying. Store leftovers in an airtight container at room temperature for 2-3 days or in your fridge for up to a week.