1Heat oven to 400°F. Lightly grease cookie sheet.
2Mix flour, 1/4 cup sugar and the baking powder in large bowl. Cut in butter, using pastry blender or crisscrossing 2 knives, until mixture looks like fine crumbs. Stir in buttermilk and gingerroot until dough leaves side of bowl and forms a ball.
3Divide dough in half. Place half of dough on cookie sheet; pat or roll into 7-inch circle. Spread lemon curd over dough to within 1/2 inch of edge. Pat or roll remaining dough into 7-inch circle; gently place over lemon curd. Gently pinch edge to seal. Sprinkle with sugar. Cut surface of dough into 8 wedges, making cuts 1/4 inch deep (do not cut into lemon curd).
4Bake 18 to 20 minutes or until golden brown. Cool 5 minutes on cookie sheet. Remove from cookie sheet to serving platter or dish; cut into wedges. Serve warm.