Thaw berries and drain, reserving juice. To the juice (about 1 c.) add ⅓ c. sugar, lemon juice and cornstarch. Cook over low heat until thickened; add food color to intensify berry color. Cool glaze.
Beat egg whites until frothy; gradually add ¼ c. sugar, beating until glistening, stiff peaks form. Spoon into cool pie shell, spreading high on sides to make hollow