Prepare the bottom crust: On a cutting board, roll out pie crusts, lay them on the sprayed sheet pan and piece together all four of the pie crusts to form one bottom crust. Use a knife or pizza wheel to cut pieces and patch together a full crust gently pressing together and up the sides of the pan. Use a fork to poke small holes (aka docking) all over the bottom crust of the sheet pan, this helps the crust lay flat during the pre-bake (or blind-bake). Sprinkle fine sugar on the bottom crust.
Use the 5th pie crust to cut the stars and stripes: Cut 25 small stars out with a 1" star cookie cutter. Using a clean ruler, lay it on the crust and use a knife or pizza wheel to cut 3 short stripes the width of the ruler and 9" long. Using a clean ruler, lay it on the crust and use a knife or pizza wheel to cut 3 long strips the width of the ruler and 16" long. Lay all the stars and stripes on the parchment lined baking sheet, and sprinkle with fine sugar.
If possible, re-chill your pie crusts in the fridge prior to baking on the sheet pans for an hour. PRO TIP: Large sheet pans don't fit in my fridge, so I set the sheet pans on ice packs to keep them as cold as possible before baking. Pie crust bakes properly when very chilled going into a hot oven as it helps harden the fat in the butter and thus the pie dough, which helps the crust maintain its structure as it bakes.
Bake both the crust and the stars and stripes at 425 degrees for 15 minutes until the crusts are just turning golden brown. Pull both pie crusts out of the oven. Leave oven on.
On the bottom pie crust, spread blueberry filling into the upper left corner in a small rectangle of the baked pie crust. Next, add the strawberry filling onto the pie. (Don't add the stars and stripes yet)
Bake at 425 for 25-30 minutes, until the berries are bubbling.
Remove pie from oven, and arrange the baked stars on top of the blueberries, add the 3 shorter stripes to the right of the blueberries, and the 3 longer stripes on the strawberries at the bottom of the pie.
Serve with whip cream and or ice cream! Enjoy...God Bless America!