3/4 cup sugar
1/3 cup flour
1/4 teaspoon salt
2 cups milk
3 beaten eggs yolks
2 tablespoons butter
1 teaspoon vanilla
3 bananas
vanilla wafers
3 tablespoons cornstarch, in place of flour, Optional

In saucepan, combine sugar, flour, and salt; gradually stir in milk. Cook & stir over medium heat till it boils. Cook 2 minutes longer, remove from heat. Stir small amount of hot mixture into yolks; return it to hot mixture, cook and stir 2 minutes. Remove from heat. Add butter, vanilla and vanilla wafers. 
Place vanilla wafers around the edge. Cool to room Temp.