Place the pecan halves into your food processor and pulse until chopped. Transfer to a small bowl and set off to the side.

Add the flours, sugar and salt to the food processor bowl and pulse to combine. Add butter and pulse again, the butter should be in fairly large pieces.

Add in chopped pecans and pulse a few times until the combined. Add water, pulsing after each tablespoon until the dough comes together and is crumbly but not overly wet.

Transfer dough onto a piece of plastic wrap, form a disc and refrigerate for 30 minutes.

On a lightly floured surface, roll dough to fit a 9-inch pie plate.