Boiled Custard
["2 qt. milk", "6 eggs, separated", "1/4 tsp. salt", "1 c. sugar", "1 Tbsp. flour", "1 tsp. vanilla"]
["Pour milk into double boiler.", "Beat egg yolks.", "Add sugar and flour.", "Pour into milk and cook until thick.", "Cool custard.", "Beat egg whites and vanilla.", "Add to custard."]
["milk", "eggs", "salt", "sugar", "flour", "vanilla"]