Black Bottom Pie
["1 (9-inch) pie crust (baked or crumb)", "1 Tbsp. gelatin in 1/4 c. cold water", "2 c. rich milk (half and half)", "4 eggs, separated", "1/2 c. sugar", "4 tsp. cornstarch", "1 1/2 oz. melted unsweetened chocolate", "1/2 tsp. vanilla", "1 Tbsp. rum or rum flavoring", "1/4 tsp. salt", "1/2 tsp. cream of tartar", "1/4 c. sugar", "1 c. heavy whipping cream", "2 Tbsp. powdered sugar"]
["Soak gelatin in cold water.", "Scald milk.", "Combine sugar and cornstarch.", "Beat egg", "yolks", "until", "light.", "Stir", "scalded milk into egg yolks.", "Using a whisk, slowly add sugar mixture. Cook in double boiler,", "stirring", "until", "mixture heavily coats spoon, approximately 20 minutes.", "Remove 1 cup custard and add melted chocolate.", "Add vanilla.", "Pour into pie crust."]
["pie crust", "gelatin", "milk", "eggs", "sugar", "cornstarch", "chocolate", "vanilla", "rum", "salt", "cream of tartar", "sugar", "heavy whipping cream", "powdered sugar"]