1) In a 3-quart saucepan, heat the oil and saute the onions for about 5 minutes until they turn soft.
2) Add in the flour and cook for about 3 minutes. Stir constantly till the flour turns a light brown.
3) Add in the stock, tomato puree, salmon and parsley.
4) Turn down the flame and cook for about 10 minutes.
5) Pour in the skim milk and stir well for about 5 minutes.
6) Serve the Salmon Bisque garnished with chopped parsley leaves.