Thread fillets on wooden skewers,place in a single layer in a shallow baking pan.Combine soy sauce,ketchup,red wine vinegar, brown sugar,oil,gingerroot and lemon rind.Pour mixture over fish. Marinate for 30 minutes,turning occasionally.Place skewers on broiler pan.Broil 3" from the heat for three minutes on each side.Serve over rice.Remaining marinade can be combined with 1/4 cup water,heated to boiling and used as a sauce.Serves 4.