Prepare Arrange all ingredients for use. on the work surface.
Melt the butter in a small pan.
Sprinkle in the flour.
Stir to a smooth foamy paste.
Add the milk gradually, stirring constantly.
Allow to simmer for about 10 minutes until creamy.
Season with salt and pepper to taste.
Season with pepper and taste.
Pour the sauce through a sieve, pressing with the back of a spoon.
Spread with a spoon through the sieve.
Serve in a jug or bowl.