Heat 2 tablespoons butter in a skillet and add shallots. Cook briefly, stirring, and add leeks. Cook, stirring, about 2 minutes and add wine and fish broth or clam juice. Cover closely and cook 5 minutes. Uncover and cook until most of the liquid evaporates. Swirl in 6 tablespoons of butter and the chives or parsley. Add salt and pepper.
05Heat remaining 1 tablespoon of butter in a large, heavy skillet and add fish fillets. Cook about 2 minutes on one side or until golden brown. Cook about 1 minute on second side. Cooking time will depend on thickness of fillets. This may have to be done in two batches.06Spoon equal batches of the leek mixture into centers of four warmed plates. Cover each portion with one cooked fillet. Spoon 1 teaspoon of lemon juice over each fillet and serve.