1Heat oven to 400ºF. Soak currants in enough warm water to cover 10 minutes to soften; drain.
2Mix flour, sugar, baking powder and salt in medium bowl. Cut in butter, using pastry blender or crisscrossing 2 knives, until mixture looks like fine crumbs. Stir in orange peel, egg, currants and just enough half-and-half until dough leaves side of bowl.
3Turn dough onto lightly floured surface. Knead lightly 10 times. Divide dough in half. Roll or pat each half into 6-inch circle, about 1/2-inch thick. Place on ungreased cookie sheet; brush with egg white.
4Bake 10 to 12 minutes or until golden brown. Immediately remove from cookie sheet. Cut each circle into 10 wedges.