Heat oven to 375°F. Spray large cookie sheet with nonstick cooking spray. In medium bowl, combine flour, brown sugar, baking powder, 1/2 teaspoon cinnamon, nutmeg, ginger and salt; mix well.
Using pastry blender or fork, cut in margarine until mixture resembles coarse crumbs. Stir in apples.
In small bowl, combine applesauce, buttermilk and egg; mix well. Add to dry ingredients; stir just until dry ingredients are moistened. (Dough will be sticky.) Place dough on sprayed cookie sheet. With wet fingers, shape into 8-inch round, about 3/4 inch thick.
In another small bowl, combine topping ingredients; sprinkle over top of dough. With sharp knife, score top surface into 8 wedges, cutting about 1/4 inch deep.
Bake at 375°F. for 18 to 22 minutes or until scones are golden brown and toothpick inserted in center comes out clean. Cut into wedges. Serve warm.