Seared Ahi Tuna with Sesame Soy Glaze (Hawaiian Style) | Arteflame

Introduction

There is something truly magical about the contrast of cool, buttery red meat against a sizzling, savory crust. This Hawaiian Grilled Ahi Tuna instantly transports me back to breezy island nights, where the aroma of toasted sesame and caramelized soy hangs in the air. It feels indulgent and sophisticated, yet it comes together faster than almost any other protein on the grill. The result is a vibrant, melt-in-your-mouth experience that turns a standard weeknight dinner into a special occasion.

Weeknight Luxury

I adore this recipe because it delivers restaurant-quality elegance with minimal effort. Using the Arteflame grill creates that elusive, professional sear without overcooking the delicate center—a feat that can be tricky in a standard pan. Plus, the homemade glaze strikes the perfect balance of salty, sweet, and nutty, acting as both a quick marinade and a finishing sauce.

Chef's Notes

• Sushi Grade is Key: Since we are keeping the center rare, always ask your fishmonger for sashimi-grade tuna to ensure safety and the cleanest flavor.
• Watch the Clock: Tuna cooks incredibly fast. Marinate for just 20 minutes to prevent the acid from curing the fish, and keep your sear time to mere seconds per side for that perfect red center.
• Screaming Hot Heat: Ensure your cooktop is over 600°F before the fish hits the steel to guarantee a crust without graying the meat.

Make it Yours

If you need to keep things gluten-free, simply swap the soy sauce for Tamari or coconut aminos; the flavor profile remains virtually identical. If tuna isn't your favorite, this sesame-ginger marinade works beautifully on salmon steaks or swordfish, though you will want to adjust the cooking time to cook those through.

Ingredients

The Fish

• 4 Ahi Tuna Steaks (Sushi Grade, approximately 1 inch thick)
• 1 tbsp Olive Oil (for coating the grill)
• Salt and freshly ground Black Pepper (to taste)

Sesame Soy Glaze & Marinade

• 1/4 cup Soy Sauce (or Tamari for gluten-free)
• 2 tbsp Sesame Oil
• 1 tbsp Rice Vinegar
• 1 tbsp Honey
• 1 tsp Fresh Ginger, grated
• 1 clove Garlic, minced
• 1 tbsp Sesame Seeds (toasted)
• 2 Green Onions, thinly sliced (green and white parts separated)

Instructions

Step 1: Prepare the Glaze

1. In a small mixing bowl, whisk together the soy sauce, sesame oil, rice vinegar, honey, grated ginger, and minced garlic.
2. Stir until the honey is fully dissolved.
3. Mix in the white parts of the sliced green onions, reserving the green tops for garnish later.
4. Pour about half of this mixture into a separate small bowl to use as a finishing glaze or dipping sauce; keep the rest for marinating.

Step 2: Marinate the Tuna

1. Pat the Ahi tuna steaks dry with paper towels to ensure the marinade adheres properly.
2. Place the tuna steaks in a shallow dish or a resealable plastic bag.
3. Pour the marinating portion of the sauce over the steaks, ensuring they are coated evenly on all sides.
4. Let the fish marinate in the refrigerator for only 15 to 20 minutes. Do not over-marinate, or the acid in the vinegar will begin to 'cook' the fish texture.

Step 3: Fire Up the Arteflame

1. Start a fire in your Arteflame grill and allow it to burn down until the center cooktop reaches a high searing temperature (over 600°F).
2. Lightly oil the flat steel cooktop with olive oil or a high-smoke-point oil to prevent sticking and ensure a golden crust.
3. Remove the tuna from the marinade and shake off excess liquid; discard the used marinade.
4. Season the steaks lightly with salt and black pepper just before hitting the grill.

Step 4: Sear the Tuna

1. Place the tuna steaks directly onto the hottest part of the flat cooktop.
2. Sear for 45 seconds to 2 minutes per side, depending on your preferred level of doneness. For a classic rare center, 1 minute per side is usually perfect.
3. Sear the edges briefly by holding the steak vertically with tongs for 15 seconds per side to cook the sesame seeds into the crust.

Step 5: Garnish and Serve

1. Remove the tuna from the grill immediately to stop the cooking process.
2. Slice the steaks against the grain into 1/4-inch thick slices.
3. Drizzle with the reserved fresh glaze.
4. Sprinkle generously with toasted sesame seeds and the reserved green onion tops before serving.

Tips

Achieving the perfect Ahi tuna steak is all about timing and temperature. Since tuna is best enjoyed rare to medium-rare, buying "sushi-grade" or "sashimi-grade" fish is essential for safety and flavor. When grilling on the Arteflame, ensure your cooktop is extremely hot before the fish touches the steel; this creates the Maillard reaction necessary for that savory crust without cooking the inside through. If you prefer your tuna rare, keep the steaks in the fridge until the very last moment before grilling—the cold center helps prevent overcooking while the outside sears. Conversely, if you prefer it medium, let the steaks sit at room temperature for 10 minutes before grilling. Always slice against the grain to sever the muscle fibers, ensuring every bite is tender and melt-in-your-mouth soft.

Variations

This sesame soy base is incredibly versatile, allowing you to tweak the flavor profile to match your cravings. You can easily adjust the heat, sweetness, or texture with just a few simple ingredient swaps. Here are a few ways to customize your Hawaiian Grilled Ahi Tuna:

• Spicy Fire Tuna: Add 1 tablespoon of Sriracha or a teaspoon of red chili flakes to the marinade for a spicy kick.
• Citrus Burst: Swap the rice vinegar for fresh lime juice and add zest for a brighter, zestier flavor profile.
• Fully Crusted: Before grilling, press the edges of the tuna firmly into a plate of mixed black and white sesame seeds for a heavy, crunchy crust.
• Pineapple Teriyaki: Add 2 tablespoons of pineapple juice to the glaze for a sweeter, more traditional Hawaiian profile.
• Wasabi Cream: Serve the finished tuna with a side of wasabi mayo (mayonnaise mixed with wasabi paste) for a creamy, pungent contrast.

Best pairings

To turn this seared tuna into a complete island feast, you need sides that complement the rich umami of the fish without overpowering it. Light, fresh, and slightly acidic sides work best to cut through the richness of the tuna. Since you already have the Arteflame fired up, utilize the flat top to grill your vegetables alongside the fish.

• Grilled Baby Bok Choy: Halved and grilled until charred, drizzled with the same sesame soy glaze.
• Coconut Jasmine Rice: The subtle sweetness of coconut milk pairs beautifully with the salty glaze.
• Mango Avocado Salad: A fresh salad with diced mango, avocado, red onion, and lime juice adds a refreshing textural contrast.
• Grilled Asparagus: Simple, charred asparagus spears seasoned with sea salt and lemon.
• Crispy Garlic Noodles: For a heartier meal, serve the sliced tuna over a bed of garlic-sesame noodles.

Conclusion

Mastering this Hawaiian Grilled Ahi Tuna recipe on your Arteflame grill is a game-changer for home cooking. It combines the ease of quick grilling with the sophistication of fine dining, proving that you do not need to go out to enjoy a world-class seafood dinner. The smoky nuances from the fire, combined with the salty, nutty sweetness of the sesame soy glaze, create a flavor profile that is truly unforgettable. Gather your friends and family, pour a crisp glass of white wine, and enjoy the fresh tastes of the islands. Once you see how effortless and delicious it is to sear tuna on the flat top, this recipe is sure to become a regular in your culinary rotation.