Sesame-Crusted Seared Ahi Tuna with Citrus-Soy Pan Sauce and Quick Cucumber Pickles
Sesame-crusted ahi tuna sears in just a couple of minutes per side, leaving the center rare and the outside golden and nutty. A citrus-soy pan sauce adds a savory-sweet glaze, and quick-pickled cucumbers provide crisp acidity to balance the plate — the whole dish is on the table in 30 minutes.
Equipment
- 12-inch cast-iron or stainless-steel skillet
- Mixing bowls (small and medium)
- Shallow dish or plate for dredging
- Chef’s knife and cutting board
- Tongs
- Whisk
- Measuring cups and spoons
- Microplane or fine grater
- Instant-read thermometer (optional, for curiosity about doneness)
Ingredients
For the Quick Pickled Cucumber:
- 1 medium English cucumber, thinly sliced choose firm, seedless; chill for extra crunch
- ¼ cup unseasoned rice vinegar look for mild, clean-tasting brands like Marukan
- 1 tablespoon granulated sugar
- ½ teaspoon Kosher salt Diamond Crystal preferred; reduce by 1/3 if using Morton
- 1 pinch red pepper flakes optional, for gentle heat
For the Sesame-Crusted Ahi Tuna:
- 12 ounces sashimi-grade ahi tuna steaks two 6-ounce steaks, about 1-inch thick; very fresh
- 1 tablespoon low-sodium soy sauce use tamari for gluten-free
- 1 teaspoon toasted sesame oil a few drops go a long way
- ¼ cup white sesame seeds lightly toasted for extra aroma
- 2 tablespoons black sesame seeds for striking contrast
- 1 tablespoon avocado oil or another neutral, high-heat oil
For the Citrus-Soy Pan Sauce:
- ⅓ cup fresh orange juice from 1 small orange
- 1 tablespoon fresh lime juice brightens the sauce
- 2 tablespoons low-sodium soy sauce
- 1 tablespoon mirin or use 1 tablespoon honey for a non-alcoholic option
- 1 teaspoon fresh ginger, finely grated
- 1 clove garlic, minced optional
- 1 tablespoon unsalted butter, cold for a silky, glossy finish
To Serve:
- 2 whole scallions, thinly sliced on a bias green onions
- 1 teaspoon toasted sesame seeds optional garnish
- 1 medium lime, cut into wedges
- 2 cups cooked jasmine rice optional, for serving
Instructions
- Quick-Pickle the Cucumber (5 minutes active + 10 minutes rest): In a medium bowl, whisk together rice vinegar, sugar, kosher salt, and a pinch of red pepper flakes until dissolved. Add the sliced cucumber and toss to coat. Let it rest for 10 minutes while you prep the tuna; the cucumbers should turn glossy and slightly bend without snapping—perfectly crisp-tender.
- Mix the Sesame Crust: In a shallow dish, combine white and black sesame seeds. Lightly toast them in a dry skillet over medium heat for 1–2 minutes beforehand if desired; they’re ready when fragrant and a few begin to pop.
- Prep the Tuna: Pat tuna steaks very dry with paper towels—dry surfaces sear best. Brush all sides with soy sauce and a few drops of toasted sesame oil. Press each steak firmly into the sesame mixture to coat all sides. The seeds should adhere in an even, mosaic-like layer.
- Preheat the Skillet (2–3 minutes): Set a 12-inch cast-iron or stainless skillet over medium-high heat. Add avocado oil; when it thins and shimmers, it’s ready. A drop of water should skitter and vanish on contact. Surface temperature is approximately 375–400°F (190–205°C).
- Sear the Tuna (about 2–3 minutes total): Lay the steaks in the hot pan. Sear 45–60 seconds on the first side without moving for a deep golden crust. Flip and sear another 45–60 seconds. Briefly kiss the edges for 10–15 seconds each. For classic rare, the center should remain cool-ruby to warm-pink—roughly 90–100°F (32–38°C) internally if measured. For medium-rare, extend each side by 15–30 seconds.
- Make the Citrus-Soy Pan Sauce (2–3 minutes): Transfer tuna to a plate to rest. Lower heat to medium. To the same skillet, add orange juice, lime juice, soy sauce, mirin (or honey), ginger, and optional garlic. Simmer, scraping up any toasty bits, until syrupy and glossy, 1–2 minutes. Turn off heat and whisk in cold butter to emulsify. The sauce should lightly coat a spoon.
- Slice and Plate: Using a sharp knife, slice tuna across the grain into 1/4-inch slices. Drain cucumbers slightly. Fan the tuna over a bed of cucumbers, spoon warm sauce over the fish, and shower with scallions and a few extra sesame seeds. Serve with lime wedges and, if desired, a scoop of hot jasmine rice.
- Optional—Warm the Plates: For restaurant-style service, warm plates in a 200°F (93°C) oven while you sear and sauce. Hot plates keep the sauce silky and the tuna tender on its way to the table.
Notes
Lisa’s Tips:
- Buy the Best Tuna: Look for sashimi-grade ahi with a vibrant, even color and clean, ocean scent. If slicing super thin, chill or briefly freeze (8–10 minutes) for cleaner cuts.
- Better Sear, Faster: Pat very dry, use high heat, and don’t overcrowd the pan. Cast-iron gives a more even, intense sear than nonstick.
- Texture Control: Rare is traditional; for medium-rare, add 15–30 seconds per side. Avoid cooking through—tuna can go chalky.
- Gluten-Free: Swap soy sauce for tamari. For a soy-free twist, try coconut aminos and season with a pinch more salt.
- Alternative Finish: No alcohol? Use honey instead of mirin. Want extra zing? Add 1 teaspoon yuzu juice in place of some lime.
- Equipment Swap: If you don’t have a cast-iron or stainless skillet, use a heavy nonstick pan, but heat it well and avoid very high flames.
Nutrition
Calories: 851kcalCarbohydrates: 77gProtein: 53gFat: 38gSaturated Fat: 9gPolyunsaturated Fat: 11gMonounsaturated Fat: 15gTrans Fat: 0.2gCholesterol: 80mgSodium: 1588mgPotassium: 1061mgFiber: 6gSugar: 15gVitamin A: 4176IUVitamin C: 38mgCalcium: 356mgIron: 7mg
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