Preheat the oven to 450°F.
Stack pie crust discs on top of each other on a floured surface. Roll out into a 17 x 12-inch rectangle. Gently fold into fourths, then transfer to a 15 x 10-inch baking sheet. Unfold and press into pan, crimping edges. Prick crust all over with a fork.
2 refrigerated pie crusts
Bake for 12-15 minutes until lightly browned around edges. Cool completely.
Combine peaches, sugar, cornstarch, and lemon juice in a large saucepan. Let sit for 5-10 minutes to draw out juices.
6 cups sliced peaches, 1 cup (200g) granulated sugar, 1/4 cup cornstarch, Juice of 1/2 a lemon
Bring to a simmer over medium/high heat, stirring frequently, until thickened and juices turn clear. Cool completely. Spread over the cooled pie crust.
In a large bowl, beat cream cheese until creamy and smooth. Add pudding mix and 1 cup milk, beating until combined. Add 1 cup of the heavy cream. Mix until combined. Spread over the peach layer to the edges of the pie crust. Refrigerate for 1 hour.
1 (8-ounce) package full-fat cream cheese, 2 (3.4-ounce) boxes instant vanilla pudding mix, 1 cup (240ml) cold milk, 1 cup (240ml) heavy cream
Beat remaining 3 cups of heavy cream, powdered sugar, and vanilla extract in a large bowl until stiff peaks form. Spread over pie in an even layer.
2/3 cup powdered sugar, 3 teaspoons vanilla extract, 3 cups (720ml) heavy cream
Slice into squares and top with additional peach slices for decoration just before serving. Best enjoyed the same day.
Additional peach slices for garnish