Black Bottom Pie
["20 to 25 chocolate wafers, crushed", "5 Tbsp. margarine, melted", "4 eggs, separated", "1 c. sugar", "1 Tbsp. plain flour", "2 c. milk", "2 (1 oz.) unsweetened chocolate", "2 tsp. vanilla", "1 envelope gelatin", "1/4 c. cold water", "1/4 tsp. cream of tartar", "1/4 c. sherry", "1/2 pt. heavy cream", "half and half, whipped", "grated chocolate"]
["Preheat oven to 275\u00b0.", "Mix crushed chocolate wafers and margarine.", "Press into a 10-inch pan; bake for 10 minutes.", "Cool. Make custard of egg yolks, 1/2 cup sugar, flour and milk.", "Cook in double boiler until thick.", "Melt chocolate.", "Add 1 1/2 cups custard and 1 teaspoon vanilla; spread over chocolate crust.", "Add gelatin, dissolved in cool water, to remaining warm custard.", "Beat egg whites.", "Add 1/2 cup sugar and cream of tartar.", "Fold whites into custard.", "Add the sherry.", "Spread over black bottom.", "Chill. Top with whipped cream and grated chocolate."]
["chocolate wafers", "margarine", "eggs", "sugar", "flour", "milk", "chocolate", "vanilla", "gelatin", "cold water", "cream of tartar", "sherry", "heavy cream", "chocolate"]