PREHEAT OVEN TO 200ºC . Melt the butter in a medium skillet over medium heat on top of the stove. Add the apples, cover and cook for 5 minutes. Remove the cover and add the sugar, juice, mace and cornstarch. Cook another minute, stirring, remove from the heat and set aside. Meanwhile, place prepared pie shell in the oven and bake for 10 minutes. While the pie shell is baking, combine cookie crumbs, melted butter and sugar and mix well. Remove pie shell from the oven and add the cooked apple mixture. Sprinkle the cookie crumble over the apples and replace in the oven for another 20 minutes. Cool the pie to room temperature before serving. ----