- Combine mustard and lemon juice until smooth; gradually stir in less sodium soy sauce until blended. Add garlic and thyme; let stand 10 minutes. Remove and reserve 1 Tbsp. mixture.
- Pour remaining mixture over fish in large plastic food storage bag. Press air out of bag; close top securely. Turn bag over several times to coat fish well. Refrigerate 30 minutes, turning bag over once.
- Remove fish from marinade; discard marinade. Place fish on grill 8 to 10 inches from hot coals. Cook 5 minutes.
- Turn fish over; brush with reserved marinade. Cook 4 to 5 minutes longer, or until fish flakes easily with fork, turning over occasionally.
Total Carbohydrates Per Serving: 1 gram