Apple Custard Pie with Saffron & Cardamom

Name: Apple Custard Pie with Saffron & Cardamom
Cook time: 6 h
Total time: 6 h
Cuisine: Asian, Indian
Ingredients: 0.75 cup whole-wheat pastry flour; 0.75 cup all-purpose flour; 0.25 teaspoon salt; 4 tablespoons (1/2 stick) cold unsalted butter, cut into 1/2-inch pieces; 3 tablespoons canola oil, chilled; 3 tablespoons ice water; 6 tablespoons (3/4 stick) unsalted butter; 2 tablespoons packed brown sugar plus 3/4 cup, divided; 2 medium green baking apples, such as Granny Smith, thinly sliced; 2 red baking apples, such as Cortland, thinly sliced; 0.75 teaspoon ground cardamom; 0.25 teaspoon saffron threads; 2 large eggs; 0.75 cup whole milk; 0.5 cup all-purpose flour