Combine the first 5 ingredients in bowl; cut margarine with a pastry blender until mixture resembles coarse meal. Add yogurt, orange rind, and orange juice to first 5 ingredients, stirring just until moistened. (Dough will be sticky) with floured hands, pet dough into a 9in. Circle on a baking sheet coated with Vegetable cooking spray. Cut into 10 wedges, cutting into but not through dough. Sprinkle with 1 tablespoon sugar. Bake at 400 for 16 minutes or until golden.