Creating Nectarine Hand Pies is simple when you follow these straightforward steps:

1. Make the Dough: In a large bowl, mix flour, salt, and granulated sugar. Cut in the butter until the mixture resembles coarse crumbs.
2. Add Ice Water: Gradually add ice water, one tablespoon at a time, mixing until the dough comes together. Form into a disc, wrap in plastic wrap, and refrigerate for at least 30 minutes.
3. Prepare the Filling: In a separate bowl, combine diced nectarines, sugar, cornstarch, vanilla extract, and cinnamon. Stir until well mixed.
4. Preheat the Oven: Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper.
5. Roll Out the Dough: On a floured surface, roll out the chilled dough to about 1/8 inch thick. Use a round cutter to cut out circles (about 5-6 inches in diameter).
6. Fill the Circles: Place a tablespoon of the nectarine filling in the center of each dough circle.
7. Seal the Pies: Fold the dough over the filling to create a half-moon shape. Press the edges together and crimp with a fork to seal.
8. Prepare for Baking: Place the hand pies on the prepared baking sheet. Brush the tops with the beaten egg and sprinkle with coarse sugar.
9. Bake: Bake in the preheated oven for 25-30 minutes or until golden brown.
10. Cool: Remove from the oven and let cool on a wire rack for about 15-20 minutes.

These steps will guide you in creating incredible Nectarine Hand Pies effortlessly!