White Sauce

Required:
1 litre milk
100gms margarine
100 gm flour
1 onion
Method:
Melt the margarine in a thick bottomed pan.ADD the flour and mix.Cook for a few minutes over gentle heat without colouring.Gradually add the warmed milk and stir till smooth. Add the onion studded with a clove.Allow to simmer for 30 mins.Remove the onion, pass the sauce through a strainer.Cover with afilm of butter or margarine to prevent skin forming