Angel Custard Cake
["2 envelopes Knox gelatine, soaked in 1/2 c. cold water 5 minutes", "6 egg yolks", "1/2 tsp. salt", "2 c. sugar", "2 c. milk", "8 oz. Cool Whip", "1 large angel food cake", "6 egg whites, beaten stiff"]
["Makes 6 or 8 servings."]
["gelatine", "egg yolks", "salt", "sugar", "milk", "angel food cake", "egg whites"]