In the bowl of a food processor, place the flour, salt and sugar. Pulse until just blended. Add the butter and shortening. Pulse a few seconds at a time, until the mixture has a grainy texture. Add 60 ml (1/4 cup) ice water. Pulse and add a little water, if necessary, until a ball starts to form. Remove the dough for the processor. Form a ball with your hands. Dust with flour and cover in plastic wrap. Let rest for about 1 hour in the refrigerator.
Roll out half the dough and line a 20-cm (8-inch) pie plate.
Freeze the remaining dough for another use.
With the rack in the lowest position, preheat the oven to 180 °C (350 °F).
In a bowl, whisk all the ingredients together except for the pecans. Pour into the pie shell and top with the pecans.
Bake for about 1 hour.
Recipes with the "Healthy Pick" stamp have been evaluated by a registered dietitian member of the Ordre professionnel des diététistes du Québec.