DOUGH: In a large bowl (you can use a food processor, but by hand with a pastry blender works best for flakiness) mix flours, sugar, and salt. Cover and refrigerate at least 2 hours. Remove from fridge and add very cold butter and shortening. Mix the lemon juice, egg, and water in a small bowl and slowly add to dry ingredients, mixing by hand, until the dough begins to form a ball. Divide ball in half, flatten to make 2 disks and wrap each in plastic wrap. Refrigerate at least 30 minutes. You can freeze up to 2 months by placing the wrapped discs in a freezer bag. Just be sure and thaw in the refrigerator before using.
PREP 1 (ROLLING PIN): Take one disk and roll it out larger than your pan onto a lightly floured work surface. Transfer the dough to a pie pan by carefully rolling the pastry around a rolling pin, then gently unrolling it over the pan. If it breaks apart, don't worry. Simply patch any cracks or tears with some dough and press down to seal. It will not show for the bottom crust.
PREP 2 (PARCHMENT): Lightly flour a disk and place between 2 sheets of parchment paper. Roll out the dough from the center to the edges, to make a circular shape larger than your pan. Remove the top sheet of parchment paper and place the pie pan in the center of the dough. Slide your hand under the parchment holding the dough centering your hand to the middle of the pan and flip over. Press the dough into the pan and carefully peel away the parchment.
BOTTOM ONLY PIE: If pre-baking a bottom crust, brush it with the eggwash and using the tines of a fork, prick the bottom and sides in a few places so that the crust will not bubble up. If not pre-baking, Do Not prick the crust! Just brush the edges with the eggwash and fill with the filling of your choice.
TOP CRUST PIE: If making a top crust, brush the edges of the bottom crust with the eggwash. If you have a pie bird, place in the center and then add the filling. Use the same method for rolling out the top crust using either prep 1 or prep 2 method (for prep 2 method, slowly flip the dough with parchment over the filling, then gently pull away the parchment paper). Using the backside tines of a fork, gently press the edges together to seal (or you can pinch the edges for a scalloped look).
Trim excess dough from around the edge and gather up the scraps. Roll it out and cut fruit, leaf, or other designs for the top of the pie. You can use cookie cutters or try out your freehand talent. NOTE: if you have a pie bird, then once you roll out your top dough, place a small 'x' in the center so it will fall over the bird. If your 'x' is too large, simply use the scraps of dough to make a 'skirt' over the bird (see photo).
If you do not have a pie bird, use a sharp knife tip or kitchen sheers, carefully cut or snip a 1/2" hole in the center of the crust to allow steam to escape. Using the tines of a fork, poke holes around the center hole to resemble a sun and sun ray pattern (you can do it so it will show where to cut the slices). Arrange the dough cut-outs on top (but not over the vent holes). Gently brush the pie crust and decorations with the eggwash.