Prepare pie filling as directed on package, using ½ c. sugar, water and egg yolks. Remove 1 c. of the hot filling, stir ginger into it and allow to cool 10 minutes.
Cool remaining filling 5 minutes, stirring several times. Pour into pie shell.
Add salt to egg whites; beat until frothy. Add remaining ¼ c. sugar gradually, beating until stiff peaks form.<