1 tbsp. cornstarch
2 tbsp. cold water
1/2 c. boiling water
3 egg whites
6 tbsp. sugar
1 tsp. vanilla
Pinch of salt

Blend cornstarch and cold water in a saucepan. Add boiling water and cook, stirring, until thick and clear. Let stand until completely cool. With electric mixer at high speed, beat egg whites until foamy. Gradually add sugar and beat until stiff, but not dry. Turn mixer on low speed and add salt and vanilla. Gradually beat in cold cornstarch mixture. Turn mixture again to high speed and mix well. Spread over cooled pie filling. Bake at 350 degrees until brown.