If your only issue with a pumpkin pie is that there's never enough — my giant incredible Pumpkin Slab Pie recipe is just for you!
On a floured surface, roll the 3 pie crusts together into a ¼ inch (6mm) thick rectangle and line an 11x17-inch (28x43cm) jelly roll pan with it. Trim away any excess dough, leaving enough crust to hang slightly over the rim of the pan to help prevent the crust from shrinking.