Grilled Soy Marinated Tuna

Grilled Soy Marinated Tuna is one of our favorite grilled fish dishes.  The marinade will permeate the tuna and create a dark brown glaze on the tuna steaks when grilled while the interior of the tuna will stay moist and flavorful.  Easy to make, Grilled Soy Marinated Tuna pairs well with simply prepared vegetable side dishes, like Broccoli al Limone, and a dry, crisp white wine.

Grilled Soy Marinated Tuna

Prep Time: 15 minutes, Total Time: 23 minutes plus marinating time. Serves 2.


  • Ahi Tuna Steaks, approximately ½ lb per person
  • 1 Tb granulated Sugar
  • 1 tsp Wasabi powder*
  • 1 Tb granulated Onion
  • 1 Tb crushed Ginger*
  • 1 Tb minced Garlic
  • 4 Tbs freshly-squeezed Lemon Juice
  • 4 Tbs Mushroom-flavored Dark Soy Sauce*
  • 2 Tbs Cooking Oil (Olive/Canola Oil blend recommended)
  • 1 tsp Sesame Oil


  1. Make the marinade by combining the sugar, wasabi powder, onion, ginger, garlic, lemon juice, mushroom-flavored dark soy sauce, cooking oil and sesame oil in a bowl and whisking together.
  2. Pour half the marinade into a suitably-sized container, place the tuna steaks in the marinade and pour the remaining marinade over the tuna. Cover, refrigerate and marinate for at least 4 hours or longer.
  3. Remove the marinating tuna from the refrigerator and heat the grill to a high heat.
  4. When the grill is hot, remove the tuna steaks from the marinade and place on the grilling surface. Grill for 4 minutes per side.
  5. Remove from the grill and serve immediately.

Grilled Soy Marinated Tuna


  • Wasabi powder is available in Asian supermarkets and from on-line spice vendors; if unavailable substitute wasabi paste.
  • Crushed ginger is available at Indian and Middle Eastern grocery stores/markets and also on-line.
  • Mushroom-flavored dark soy sauce is available in Asian supermarkets. If unavailable, substitute regular soy sauce.

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