Frosted Lemon Pie
["1 c. vanilla wafer crumbs", "3 eggs, separated", "1 c. sugar", "2 Tbsp. water", "grated peel of 1 lemon", "1/4 c. lemon juice", "1/2 c. whipping cream, whipped", "vanilla wafers and whipped cream for garnish"]
["Line an 8-inch pie pan with wafer crumbs.", "Beat egg yolks until thick.", "Add 1/2 cup sugar, water, lemon peel and juice. Cook in a double boiler until very thick, about 12 to 15 minutes. Cool.", "Beat egg whites until stiff.", "Add remaining sugar gradually; fold into lemon mixture.", "Fold in whipped cream.", "Pour into pie pan lined with crumbs.", "Place, unwrapped, in freezer and let harden, at least 5 hours."]
["vanilla wafer crumbs", "eggs", "sugar", "water", "lemon", "lemon juice", "whipping cream", "vanilla wafers"]