Melt chocolate with margarine. Set aside to cool.
Beat egg whites until stiff.
Beat yolks with sugar and add chocolate.
Fold yolk mixture into whites
Pour 1/2 of batter into one 9" round pan or two pie pans. Reserve the other half.
Bake 30 Minutes at 350°. Remove from oven and allow to cool.
Pour remaining batter on top and freeze.
Whip topping until stiff. Decorate pie with whip and top with chocolate shavings.
8 servings