Preheat Oven: 325 degrees
Mix 1/2 cup sugar, flour and salt in top of double
boiler. Blend in 3 egg yolks and milk. Cook,
uncovered, over boiling water, stirring constantly
for 10 to 12 minutes or until thickened. Remove
from heat; stir in vanilla.
In a 1 1/2 - 2 quart casserole pour a small amount
of custard, top with wafers and then banana slices.
Continue to layer custard, wafers and banana
slices ending with custard.
Beat egg whites until soft peaks form; gradually
add remaining 1/4 cup sugar and beat until stiff
peaks form. Spoon over pudding, spreading
evenly to cover entire surface and sealing well to
Bake in center of oven until golden browned, 15
to 20 minutes.
Serve warm. Refrigerate left-overs.