4: Prepare sorrel sauce: Discard fat from frying pan, and put back on medium heat. Add 2 tablespoons fish fumet, 1 glass dry white wine, and carefully scrape the bottom of the pan with a wooden spatula to get all the cooking juices, mix them with wine and fumet, and leave to reduce to about half.
5: Add all the sorrel leaves to the frying pan, stir gently...
6: ...in a few seconds they will wilt, and unfortunately lose their nice green color.
7: Add 200 ml liquid cream, bring to the boil then salt and pepper. Leave to thicken to your taste, check seasoning, and the sorrel sauce is ready.
8: To serve: on a hot plate (important), arrange a salmon steak in centre, surround with sorrel sauce. Serve with rice for example.
Remarks
A word of caution: you should not chop sorrel, but add the leaves as the taste is better.