Lemon Chiffon Pie
["1 - 9 inch baked pie shell or an unbaked graham cracker crust", "1 1/2 tsp. plain gelatin", "1/3 c. cold water", "4 egg yolks", "1/3 c. granulated sugar", "1 Tbsp. grated lemon rind", "1/4 c. lemon juice", "4 egg whites", "1/4 tsp. salt", "1/2 c. granulated sugar"]
["Add gelatin to water, set aside.", "Put yolks in double boiler, stir in 1/3 c. sugar, lemon rind and juice.", "Cook, stirring over boiling water 5 minutes or until thickened.", "Stir in gelatin until melted.", "Remove from heat.", "Beat egg whites and salt until they form peaks.", "Slowly add 1/2 c. sugar, while beating stiff. Gently fold in hot mixture.", "Turn into shell, chill.", "Can be served with whipped cream."]
["shell", "gelatin", "cold water", "egg yolks", "sugar", "lemon rind", "lemon juice", "egg whites", "salt", "sugar"]