1In a small sauce pan heat milk up , just to the point of boiling but DON'T BOIL.
2Beat the eggs in the top of a double boiler pan. To the beaten egg yolks , beat in the sugar , salt , cornstarch and butter and scalded milk.
3Cook over boiling water in a double broiler pan until thick ; stirring constantly ; remove from the heat and add the vanilla and sliced banana's.
4Pour into cookie crumb crust and chill.