Pre-heat your oven to 425 degrees. Combine all of your dry ingredients, and mix them together well. If you like spicier scones, add another 1/2 tsp cinnamon, or better yet, some nutmeg or cloves. Cut in the 1/4 cup or margarine or butter. Shred your apple. Add the shredded apple, then the milk and mix until they form a soft dough. Add a bit of flour if the dough is too sticky, it really depends on how moist your shredded apple is. Knead a few times, working some extra flour into it until it is barely sticky. Divide into two balls of dough. Flatten until they are two circles that are about 6 inches in diameter. If you like, scour lines on the top to divide them into 6 pieces. Place them on a well-greased baking sheet and sprinkle them with brown sugar and/or cinnamon. Pop into the oven and bake for 15- 20 minutes until they are golden brown. Remove and cool. When the scones are cooled, whisk together the glaze ingredients until they are smooth. Drizzle over the scones then let harden completely.