01 -
In a medium bowl, whisk together flour and salt. Incorporate cold, cubed butter using a pastry cutter or fingers until the mixture resembles coarse crumbs with some pea-sized pieces. Add ice water one tablespoon at a time, mixing gently until dough just comes together. Shape into a disk, wrap in plastic, and refrigerate for at least 30 minutes.
02 -
Combine sliced nectarines, granulated sugar, cornstarch, lemon juice, and cinnamon in a bowl. Toss gently and set aside.
03 -
In a saucepan, combine whole milk, heavy cream, and vanilla bean seeds and pod. Heat over medium until steaming. In a separate bowl, whisk together egg yolks, sugar, and cornstarch until smooth. Temper yolks slowly with about 1/3 cup hot milk mixture while whisking. Pour mixture back into saucepan and cook over medium-low heat, whisking constantly, until thickened, 3 to 5 minutes. Remove from heat, strain through a fine mesh sieve, and cool slightly.
04 -
Preheat oven to 375°F. On a floured surface, roll dough into a 12-inch circle. Carefully transfer to a parchment-lined baking sheet. Spread a thin layer of custard over the dough, leaving a 2-inch border. Arrange nectarines evenly on top. Fold edges over fruit, pleating to form a rustic border. Brush dough edges with beaten egg and sprinkle with coarse sugar if desired.
05 -
Bake for 35 to 40 minutes until crust is golden and nectarines are bubbling. Allow to cool on baking sheet for 15 minutes before slicing. Serve warm or at room temperature, with whipped cream or vanilla ice cream if desired.