Chopped walnuts, herbs, and bread crumbs make a satisfying topping for lightly baked fish. Serve with simple buttered vegetables — these elegant fillets should be the star of the show. Nuts are high in fat, but most of this is the monounsaturated kind that helps to guard against heart disease and lowers blood cholesterol. Walnuts also contain health-promoting omega-3s, as well as copper and magnesium, to help to maintain strong bones and nerve and muscle function. Here is a step-by-step guide on making herb and crusted fish fillets that are both health and delicious.