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Seared Ahi Tuna

This seared ahi tuna recipe delivers restaurant-quality results in less than 15 minutes. The contrast between the perfectly crusted exterior and the rare, ruby-red center creates a texture experience that feels both luxurious and surprisingly simple to achieve.
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Prep Time 10 minutes
Cook Time 4 minutes
Total Time 14 minutes
Servings: 4 servings
Course: Main Course
Cuisine: Japanese
Calories: 245
Ingredients Equipment Method Notes

Ingredients
  

For the Tuna
  • 1.5 pounds sushi-grade ahi tuna steaks about 1 inch thick
  • 3 tablespoons sesame seeds mix of black and white
  • 2 tablespoons high-heat oil avocado or grapeseed
  • 1 teaspoon kosher salt
  • 1/2 teaspoon black pepper
For the Soy Dipping Sauce
  • 1/4 cup soy sauce
  • 2 tablespoons rice vinegar
  • 1 tablespoon honey
  • 1 teaspoon sesame oil
  • 1 teaspoon grated fresh ginger
  • 1 clove garlic minced
  • 1 teaspoon sriracha optional

Equipment

  • Cast iron skillet or heavy-bottomed stainless steel pan
  • Sharp chef's knife or sashimi knife
  • Shallow plate or wide bowl for coating
  • Paper towels
  • Tongs
  • Cutting board
  • Small bowl for mixing seasonings

Method
 

  1. Remove the tuna from the refrigerator and pat it completely dry with paper towels. Let the fish sit at room temperature for about 10 minutes while you prep everything else.
  2. Whisk together the soy sauce, rice vinegar, honey, sesame oil, ginger, garlic, and sriracha in a small bowl. Set the sauce aside to let the flavors meld while you cook the tuna.
  3. Mix the sesame seeds, salt, and pepper on a shallow plate. Press each side of the tuna steaks firmly into the sesame mixture, ensuring an even coating. Don't skip coating the edges.
  4. Place your cast iron skillet over high heat and let it preheat for 3 to 4 minutes until smoking hot. Add the oil only when the pan is fully heated, swirling to coat the bottom evenly.
  5. Carefully lay the tuna steaks in the pan. Sear for exactly 90 seconds without moving the fish at all.
  6. Use tongs to flip each steak and sear the second side for another 90 seconds, maintaining that same hands-off approach.
  7. Hold each tuna steak upright with your tongs and briefly sear each edge for about 15 seconds to complete the sesame crust around the entire piece.
  8. Transfer the seared tuna to a cutting board and let it rest for 2 minutes. Use a very sharp knife to cut the tuna into 1/4-inch thick slices, wiping the blade between cuts for clean edges. Serve immediately with the dipping sauce.

Notes

Buy the thickest tuna steaks you can find, at least 1 inch thick. Source your tuna from a reputable fishmonger who can confirm it's sushi-grade and safe to eat rare. The quality of your fish determines 80% of this dish's success. Freeze the tuna steaks for 15 minutes before searing if you want an even rarer center. Serve immediately after slicing because the residual heat continues cooking the fish. Store leftover seared tuna in an airtight container in the refrigerator for up to 24 hours, but consume chilled or at room temperature rather than reheating for best texture.