- Preheat oven to 200˚C (400˚F).
- Arrange salmon in a single layer on a large sheet of lightly oiled aluminium foil. Drizzle with lemon juice and season with pepper to taste. Fold foil tightly shut and place on a baking sheet.
- Bake in the oven for about 15 minutes, or until fish is opaque and flakes easily with a fork. In the meantime, using a blender or food processor, mix cottage cheese, plain yogurt, watercress, parsley, chives and Parmesan cheese until smooth. (Alternately, press cottage cheese through a sieve and add remaining ingredients, mixing well, if you do not have a food processor or blender.)
- Place salmon on 4 plates and decorate with sprigs of watercress. Serve watercress sauce in a sauce boat.
Tip: Omega-3 fats have several positive effects on heart health. They thin the blood, promote a decrease in triglycerides, help control blood pressure, and play a positive role in the body's anti-inflammatory system. They're found in high quantity in fatty fish (e.g. salmon, mackerel, trout, sardines).