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 8 cm from the heat for three minutes on each side.Serve over rice.Remaining marinade can be combined with quarter cup water,heated to boiling and used as a sauce.Serves 4.