Preheat oven to 375 degrees. Prepare two baking sheets by lining them each with a piece of parchment. Make sure dough is at room temperature for at least 15 minutes.
Combine cherries, sugar, and lemon juice in a small saucepan. Cook over 5 minutes over medium heat, stirring occasionally. In a small bowl, mix together the cornstarch and water. Add it to the saucepan and bring to a boil, stirring often. Remove from heat and let cool to room temperature, stirring occasionally. This could take about 30 minutes.
Unroll one pie crust onto a lightly floured surface or piece of parchment. Using a 3 1/2" biscuit cutter cut 7 rounds from the pie crust. Gather the dough scraps together and reroll and cut out 4 more circles. Repeat with second pie crust. You should have 22 discs in total to make 11 hand pies.
Place 5 of the rounds evenly spaced on one prepared baking sheet and 6 on the other.
Lightly beat the egg and tablespoon of water in a small bowl. Using your finger or a small pastry brush, dip it into the egg wash and wet the outer ½-inch of each circle on the baking sheets. Spoon a heaping tablespoon of the cherry pie filling onto each circle. Dip a finger or small pastry brush into the egg wash again and wet the outer edge of the remaining circles before placing one each on top of the cherry filling. Use a fork press the edges of each pie together to seal.
Using a pastry brush, lightly brush the tops of each hand pie with the egg wash. Evenly distribute the raw sugar among the pies and then gently slice a + in the top of each pie with a sharp knife.
Bake 23-25 minutes or until golden brown.