Ingredients:

• 4 tuna steaks (4 oz. each)
  
• 2 tablespoons low sodium soy sauce
  
• 1 tablespoon Worcestershire sauce
  
• 1 teaspoon sugar
  
• 1 teaspoon wholegrain mustard
  
• 1 tablespoon vegetable oil
  
• chopped parsley for garnish (optional)
  
• lemon wedges (optional)

Directions:

1. Place tuna in a shallow dish in a single layer.
   
2. In a small bowl, whisk together the soy sauce, Worcestershire sauce, sugar, mustard, and oil until combined.
   
3. Pour marinde over tuna and gently turn steaks until well-coated on each side. Cover with plastic wrap and refrigerate for at least 30 minutes up to 2 hours.
   
4. Prepare grill. Remove tuna and reserve marinade for basting. Grill tuna for about 10-15 minutes, turning once and basting often with reserved marinade.
   
5. Serve tuna steaks with lemon wedges and garnished with chopped parsley.