Key Lime Pie
["1 envelope unflavored gelatin", "1/4 c. cold water", "4 eggs, separated", "1 c. sugar, divided", "1/3 c. lime juice", "1/2 tsp. salt", "2 tsp. grated lime peel", "green food coloring"]
["Soften gelatin in", "cold", "water.", "Beat egg yolks.", "Add 1 cup sugar, lime juice and salt.", "Cook over hot water, stirring constantly until", "thickened.", "Add", "grated", "peel", "and", "gelatin; stir until gelatin\tis dissolved.", "Tint pale green with coloring; cool.", "Beat egg whites stiff, but not dry.\tAdd remaining sugar slowly,", "beating", "after", "each", "addition.", "Fold into lime mixture. Pour into baked 9-inch pie shell.", "Chill until firm."]
["unflavored gelatin", "cold water", "eggs", "sugar", "lime juice", "salt", "lime peel", "green food coloring"]