Remove the dough disk from refrigerator & roll out onto a lightly floured surface into a 12″ round about ⅛” thick.
Gently transfer the rolled dough into a deep dish 9″ pie pan, leaving a 1-2″ overhang all the way around.
Tuck the edge underneath itself to form a ring around the edge of the pie plate. Flute the edges by pinching the dough between your thumb & pointer finger on one hand & your pointer finger knuckle on the other. Place the pie shell in the freezer to keep chilled while you prepare the filling.
Filling
Peel & core the apples & persimmons, then cut into ⅛”- ¼” slices. Place in a large mixing bowl & toss with the lemon juice, sugars, & spices. Set aside for at least 15 minutes so the juices begin to release from the fruit.
Preheat oven to 400 F.
Crumble Topping
Combine the cold butter cubes, flour, sugars, oats, almonds, salt & cinnamon together in a large bowl. Use your hands to work the butter into the other ingredients until coarse crumbles the size of peas form.
Assemble/Bake
Pour the apple filling into the bottom shell, forming a mound that is taller in the center of the pie.
Whisk the egg & water until blended. Gently brush the exposed, fluted edges of the pie with the egg wash. Sprinkle the crust with coarse sugar. Top pie evenly with crumble topping.
Bake at 400 F. for 20 minutes, then lower the temperature to 375 F. & bake for another 30-40 minutes, rotating the pan halfway through. Bake until the filling is bubbly and the crumble topping turns a deep golden color, you may need to cover the edges and or/tent the pie to keep from over-browning. The fruit should be just soft when poked with a toothpick. Allow to cool on a rack for at least 1-3 hours before serving.
Cream Topping
Whip together sour cream & vanilla sugar.
Serve with your choice of ‘cream topping’, vanilla ice cream or whipped topping.