In a large saucepan sugar flour and salt with skim milk cook and stir over medium heat until thickened and bubbly reduce heat to low cook and stir 2 minutes longer remove from Heat

In a small bowl whisk eggs with a small amount of hot mixture into eggs return all to pan with you constantly bring to a gentle boil cook and stir 2 minutes remove from heat stir in vanilla to 15 minutes stirring occasionally

In an ungreased 18 inch square baking dish but you're 25 and Nilla wafers half of the banana slices and half of the pudding repeat layers press plastic wrap on the surface of pudding refrigerate 4 hours or overnight just before serving crushing many Wafers and sprinkle over top