- Preheat oven to 375°F (180°C). Combine flour and salt. With cool fingertips, rub shortening lightly into flour until mixture resembles coarse meal. Add water, a little at a time, and mix until dough just comes together. Don’t overmix. Divide dough and form into two discs, one twice as large as the other; wrap in plastic. Chill for at least 30 min.
- Meanwhile, toss filling ingredients together in a large bowl until just combined. Set aside. Dust work surface with 1 tbsp (15 mL) flour and roll larger dough into a circle, 1/8 in. (3 mm) thick and slightly larger than a 9-in. (23 cm) pie plate. Transfer dough (see below) and fit into pie plate with dough overhanging edges slightly. Add prepared filling.
- Create lattice top and crimp edges (see full steps at right). Brush egg over the top and edges of the pie. Bake on a tray set on the middle rack of the oven for 50 to 60 min. Allow to cool completely before slicing.
Tip: Chill the flour, mixing bowl and shortening in the fridge before working with them. The colder the better.