In large bowl, stir together flour, 4 tablespoons sugar, baking powder, ginger,
baking soda and salt.
With 2 knives or pastry blender, cut in 1/2 cup butter until
particles are fine.
Stir in orange peel.
With fork, beat together egg and buttermilk;
add to flour mixture and mix. Divide in 2 parts. Turn each onto heavily floured
surface; knead lightly with floured hands. Pat into circles 5/8-inch thick and with
floured knife, cut into 6 wedges. Place on ungreased cookie sheet.
Sprinkle each with 1/2 teaspoon remaining sugar.
Bake at 425 degrees F until golden, about 14 minutes.