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

Mix the cornstarch and cold water well. Add boiling water. Cook until thick, then cool. Beat egg whites to soft peaks. Add cooled cornstarch. Continue beating until stiff. Add sugar 1 tablespoon at a time. Add vanilla. Spread on pie; bake at 325 for 15 minutes or until brown. Turn off heat and let cool in oven with door open.