Whisk water, vinegar and egg in small bowl

Combine flour, baking powder and salt medium bowl mix together

Cut in shortening with folks to resembles coarse meal

Dust in flour with liquid mixture 1 tablespoon at time

Toss with fork after each addition of liquid until flour is all moist and dough comes off side of bowl and shape into ball

Divide in half and flatten into flat shape(wrap in plastic wrap)

Preheat oven to 325

Beat potatoes and egg yolks in medium bowl

Add milk, sugar, butter, cinnamon, nutmeg, rum, borban and salt until smooth

Roll crust to 1/4 inch thick and place in 9inch plate

Pour mixture into plate

Bake 45-50 minutes until crust good and brown or knife inserted into center comes out clean