Grilled Sesame-Crusted Ahi Tuna Steaks

There’s something truly special about the fresh, clean taste of sushi. That delicate balance of savory, sweet, and umami, coupled with the melt-in-your-mouth texture of raw fish, is an experience I constantly crave. But when I'm looking for a warm, comforting, and versatile meal that brings those same vibrant flavors home, my go-to is this **Grilled Sesame-Crusted Ahi Tuna**. This recipe perfectly captures that sushi-grade essence, offering a healthy and delicious meal that's surprisingly easy to prepare, and adaptable whether you want a light salad or a more substantial dish.

The Magic of Ahi: Sourcing and Searing

The star of this dish, of course, is the ahi tuna. Also known as yellowfin tuna, ahi is prized for its firm texture and mild, buttery flavor. When seared properly, the exterior forms a beautiful crust while the interior remains wonderfully rare – just like the tuna you’d find in your favorite sushi roll.

I recently stumbled upon a fantastic new store called Wild Fork Foods, and I have to tell you, their selection of meats is impressive. From various cuts of beef and poultry to an array of seafood, it’s a meat lover’s paradise. I picked up some gorgeous ahi tuna steaks there, and they were perfect for this recipe. Just to be clear, this isn't an affiliate endorsement; I simply had a great experience with their products and wanted to share!

When choosing ahi tuna, look for thick, vibrant red steaks with no discoloration. Freshness is key, especially since we’ll be enjoying it rare. Thicker steaks (about 1-1.5 inches) are ideal as they allow for that perfect sear while keeping the center cool and tender. The searing process should cook and kill any surface bacteria, but you generally want to make sure it's previously been deep-frozen to keep it safe throughout.

The Sesame Crust: A Feast for the Eyes and Palate

One of the visual and textural highlights of this dish is the sesame crust. I love using a mix of both black sesame seeds and regular white sesame seeds. The black sesame seeds add a striking contrast and a slightly nuttier flavor, while the white sesame seeds offer a classic touch. Together, they create a beautiful, almost speckled coating that looks incredibly appealing and adds a satisfying crunch.

The key to getting those sesame seeds to adhere beautifully to the tuna is a brief marinade. This initial step not only infuses the tuna with flavor but also provides a sticky surface for the seeds to cling to. Don't worry about an overpowering marinade; we’re looking for just enough to create that perfect foundation for the crust.

The Irresistible Glaze: Sweet, Savory, and Umami

Now, let's talk about the sauce and marinade. This is where a lot of the flavor truly comes alive that adds something a little reminiscent of sushi. This recipe creates a rich, complex glaze that balances sweet, savory, and tangy notes.

My go-to sauce ingredients are:

  • 1/2 cup soy sauce: The foundation of savory, salty flavor.
  • 4 tablespoons sesame oil: Adds a deep, nutty aroma and distinct flavor.
  • 2 tablespoons mirin: A sweet rice wine that contributes a subtle sweetness and gloss.
  • 2 tablespoons honey: For a touch of natural sweetness that helps the glaze thicken and caramelize.
  • 2 tablespoons rice wine vinegar: Provides a bright, tangy counterpoint to the richness.
  • 2 tablespoons minced garlic: Adds a pungent, aromatic kick.
  • 2 green onions, chopped: For a fresh, oniony bite and vibrant color.

I start by whisking all these ingredients together. Half of this glorious mixture goes into a shallow dish with the ahi tuna for a brief marinade. We’re talking 10-15 minutes max; we don't want to "cook" the tuna with the acidity of the vinegar and create some kind of weird almost-sushi ceviche (we'll do ceviche another day). This quick soak allows the tuna to absorb some of those incredible flavors and, importantly, helps the sesame seeds stick when we press them onto the fish.

The other half of the sauce is reserved for the glaze. After the tuna has had its quick marinade, I pour the remaining sauce into a small saucepan and whisk in 1 tablespoon of cornstarch. Then, I gently heat it over medium heat, stirring constantly, for just a couple of minutes until it thickens into a beautiful, glossy glaze. This transformation is magical – it goes from a thin liquid to a spoon-coating sauce that’s perfect for drizzling over the finished tuna.

The Art of the Sear: Grill Mastery

Grilling ahi tuna is all about high heat and quick cooking. For this I like to use my grill's sear burners, which create a super-hot surface and have direct flame going straight at the grates. These things get incredibly hot, creating that perfect char on the outside while leaving the inside rare.

Before placing the tuna on the grill, make sure your grates are clean and well-oiled to prevent sticking. Once the grill is screaming hot, I carefully place the sesame-crusted tuna steaks directly over the sear burners. We’re talking 1 to 2 minutes per side. That's it! This short burst of intense heat is just enough to create that beautiful crust and cook the outer layer with nice looking grill marks on the seeds, leaving the center still cool and red. The exact cooking time will depend on the thickness of your tuna and how rare you prefer it. For a true sushi-like flavor experience, aim for a very rare center.

Rest, Slice, and Serve: The Grand Finale

Once the tuna is seared to perfection, resist the urge to cut into it immediately. Like any good piece of meat, resting is crucial. Transfer the tuna to a cutting board and let it rest for a couple of minutes. This allows the juices to redistribute, ensuring a more tender and flavorful result.

After resting, grab a sharp knife and slice the tuna thinly. You'll be rewarded with a stunning cross-section: a dark, crispy crust giving way to a white cooked layer, and then the vibrant, rare red center. It's truly a work of art!

Serving Suggestions: Versatility on Your Plate

Now for the best part – enjoying your masterpiece! This Grilled Sesame-Crusted Ahi Tuna is incredibly versatile and pairs well with a variety of sides.

For a classic, comforting meal that soaks up all that delicious glaze, I love serving it alongside a bed of fluffy white rice. The mild flavor of the rice provides a perfect canvas for the rich tuna and vibrant sauce.

If you’re looking for a lighter, fresher option, it’s absolutely fantastic on top of a crisp salad. Think mixed greens, thinly sliced cucumbers, shredded carrots, and perhaps some avocado. The warm tuna, cool salad, and tangy dressing create a wonderful textural and flavor contrast.

And for those who like an extra kick, don't forget to offer a dollop of wasabi paste on the side. Its fiery heat perfectly complements the rich tuna and sweet-savory glaze, mimicking that authentic sushi experience.

Grilled Sesame-Crusted Ahi Tuna is more than just a meal; it's an experience. It’s a dish that brings the sophisticated flavors of a sushi restaurant right to your home, all while being surprisingly straightforward to make. The combination of the nutty sesame crust, the perfectly seared ahi, and that irresistible sweet and savory glaze makes for a truly memorable culinary adventure. Why not try it out for your next dinner?

Grilled Sesame Crusted Ahi Tuna Steaks

Prep Time: 15 mins | Cook Time: 4 mins | Yield: 2-3 servings

Ingredients

  • 2 ahi tuna steaks, high grade and previously frozen
  • 1/2 cup soy sauce
  • 4 TB sesame oil
  • 2 TB mirin rice wine
  • 2 TB honey
  • 2 TB rice wine vinegar
  • 2 TB minced garlic
  • 2 green onions, chopped
  • 1 TB corn starch
  • 1/2 to 1 cup sesame seeds, mixed black and white
  • oil for grill grates

Instructions

  1. Make sure the tuna steaks are completely thawed and pat surface dry with a paper towel. Preheat grill for high heat.
  2. Mix together soy sauce, sesame oil, mirin, honey, vinegar, garlic, and onions in a small bowl. Pour half over tuna in a ziploc bag, and pour the other half into a small sauce pan.
  3. In a shallow plate or pan, mix sesame seed coating.
  4. Let fish marinate for no more than 10-15 minutes in the fridge. Remove from marinade and press into the sesame seeds on all sides to create coating.
  5. Meanwhile, heat reserved marinade over medium heat and stir in corn starch. Stir constantly until mixture starts to thicken and remove from the heat.
  6. Oil grill grates as needed and sear tuna steaks for 1-2 minutes per side depending on thickness and how rare you like it. Mine required just under 2 minutes per side and still had a nice rare center.
  7. Let tuna rest on a plate for around 5 minutes. Slice thinly and serve with the reserved glaze.

Notes

Works well standalone or as a topping for a crisp salad. I have also had (and want to try) a Cajun crust instead of the sesame seeds, using a Cajun spice mix and skipping the soy marinade. Will try that another day!

Pin to Pinterest