Preheat oven to 450℉ and place a baking sheet in the oven on the bottom rack.
Peel, core and slice pears, place into a bowl and set aside.
Add sugar, flour, salt and cinnamon into a bowl and stir with a whisk to combine.
Lightly flour work surface and roll out half the pastry dough, gently place into 9 inch pie pan.
Layer pear slices in a single layer, followed by a layer of sugar/flour mixture. Repeat until all pears and sugar/flour have been used.
Dot with butter and sprinkle with lemon juice.
Add more flour to work surface, if needed, and roll out second half of the pastry dough. Gently place on top, tuck the excess under the bottom crust, press to seal and crimp with fingers.
Carefully cut out a personalized vent to allow steam to escape and brush with optional egg wash.
Place in oven on preheated pan. Bake at 450℉ for 10 minutes, reduce oven temp to 350℉ and bake an additional 35-40 minutes until crust is golden brown.