[header] How to bake a sweet potato pie [title] Place the flour, salt and butter or shortening into a blender fitted with a steel blade. [step] Blend the mixture until it looks like crumbs. [title] Remove the crust from the blender and place it on a cutting board. 
[step] Add the water one tablespoon at a time until the dough forms a ball. [title] Roll the crust out using a rolling pin into a 12 " (30 cm) circle.