Mix egg yolk with a small amount of the milk in saucepan. Add remaining milk, 3 tablespoons sugar, salt and Minute Tapioca. Place over medium heat. Cook until mixture comes to a full boil, stirring constantly-this takes 5-8 minutes (Do not overcool..mixture thickens as it cools.) Remove from heat.
Beat egg white until foamy throughout; add 2 tablespoons sugar, 1 tablespoon at a time, and continue beating with rotary egg beater until mixture will stand in soft peaks. Add hot tapioca mixture, stirring constantly. Add vanilla. Cool, stirring after 15-20 minutes. Chill. Just before serving, dice bananas and fold into tapioca cream. Serve with nana slices. Makes a luxurious dessert for 6 people. So elegant to look at-such heaven to taste-you'll hardly believe it's so quick and easy to fix. And for all its homemade goodness-it's mightly thrifty, too.