Cut butter and shortening into small pieces and freeze. Keep flour in the freezer as well. Tip: Keeping pie crust ingredients cold creates a much better quality crumble.
Use a food processor to pulse the flour, salt, butter, and shortening until the mixture resembles a coarse meal.
Add the cold ice water and pulse until it forms a dough. Add water, as needed, a little at a time if the dough is too dry.
Cut the dough ball into half and flatten each into a circle. Wrap in plastic wrap and chill for at least 30 minutes and up to 3 days.
Apple Filling
Peel then dice the apples into pieces about 1/2 an inch (1cm).
Cook apples in a large heavy saucepan over low heat.
Add the cinnamon, nutmeg, salt, white sugar, brown sugar, vanilla, flour, and water.
Cook until the apple has softened to the consistency you like, about 20 minutes. Remove from heat.
Bacon Lattice
Cut the bacon into even long strips about 1/2 inch (1cm) thick. Brush with maple syrup.
Roll out the second chilled dough into a 10-inch (25cm) round and cut it into even strips about 1/2 inch (1cm) thick for the lattice.
Use one strip of bacon and one strip of pie pastry in an alternating pattern to create a lattice on parchment paper.
Apply a light sprinkling of the rub that will give the lattice a slightly salty note.
Freeze the lattice until hard (about 20 to 30 minutes) on a baking tray.
Pie Crust
Preheat oven to 375 degrees F (190 degrees C).
Roll out one of the chilled doughs into a 14-inch (35cm) round, then transfer it to your pie dish.
Trim the overhang to ¾ inch (1cm) and crimp with a fork. Refrigerate the pie crust until ready to cook.
Remove the pie crust from the fridge and fill it with pie beads then bake for 10 minutes.
Apple Pie
Remove the pie crust from the oven and then remove the pie beads.
Spoon the apple pie filling into the warm pie crust.
Carefully flip the frozen bacon lattice you made on top of the pie. (The rub side of the lattice will be on the underside touching the apple filling).
Trim off any lattice edges with a knife or pair of scissors. Brush with beaten egg yolk.
Return the apple pie to the oven and bake until the filling is bubbly and the bacon and crust are cooked, this takes about 35 to 40 minutes.
Remove the bacon apple lattice pie and place it on a cooling rack.
Cut then serve the pie with vanilla ice cream and garnish with some crispy bacon strips.