In a medium bowl, whisk flour, bran, and salt together.
1 cup whole wheat flour, 1 TBS wheat bran, ½ tsp salt
Add the butter and use a fork to combine it with the dry ingredients until it resembles coarse, wet sand.
6 TBS softened unsalted butter
Sprinkle in the ice water a teaspoon at a time until the pastry is just moist enough to hold together when you squeeze a handful.
2 - 3 TBS ice cold water
Create a ball and place it on a piece of parchment paper that's about 15" long. Squash the ball into a disc, then lay another 15" long piece of parchment on top.
Use a rolling pin to roll it into an 11" circle. Take off the top piece of parchment paper and turn the piece with the dough over a pie plate. Peel off the parchment paper and gently settle the dough into the pie plate.
Remove any overhang, using scraps to fill in any gaps on the edge of the pastry. Generously dock the bottom and sides of the pastry with a fork.
To blind bake: Crumple up one of the pieces of parchment then smooth it out and place it on top of the pie dough. Pour dry beans or rice into the pie plate until full. Bake in a 425°F oven for 8 minutes, then lift out the rice or beans by using the parchment paper overhang and bake the crust for an additional 2 - 3 minutes or until the bottom looks dry.