How to Make It
Preheat oven to 425ºF. Toss together peaches, apricots, and 2 tablespoons of the flour in a large bowl. Whisk together brown sugar, salt, and remaining 1/4 cup flour in a medium bowl. Add tamarind paste to brown sugar mixture, and stir to into a wet, sandy mixture; fold into bowl with peaches to combine. Pour mixture into a 13- x 9-inch baking dish lightly greased with cooking spray.
Roll out piecrusts on a clean surface. Cut 18 (2 1/2-inch) squares; reserve scrapes for another use. Arrange squares in a pattern over peach filling. Whisk together egg white and water in a small bowl; brush over squares. Sprinkle with sugar. Bake in preheated oven until golden and bubbly, about 35 minutes. Let stand 10 minutes before serving. Top with ice cream.