Seared Tataki Tuna Recipe

Inspect and dry

Pat the sushi-grade tuna loin very dry with paper towels. Trim any sinew and remove any discolored edges. Leaving the loin whole ensures clean slices after searing.

Season the tuna lightly and coat: Sprinkle kosher salt and freshly ground black pepper evenly on all sides of the loin. Lightly rub 2 tablespoons neutral oil over the surface to help conduct heat and promote even searing.

Chill briefly: Place the seasoned loin on a plate and refrigerate for 10 minutes to firm the texture slightly — this helps for cleaner slicing and a cooler center.

Combine liquids: In a small bowl, whisk together 1/2 cup low-sodium soy sauce, 3 tablespoons freshly squeezed yuzu or lemon juice, 1 tablespoon mirin, 1 teaspoon rice vinegar, and 2 tablespoons dashi stock until uniform.

Adjust sweetness and taste: Add 1/2 teaspoon granulated sugar and whisk until dissolved. Taste and adjust — if too salty, add 1/2 tablespoon more citrus; if too tart, add a touch more mirin or a pinch more sugar. Chill the ponzu in the refrigerator until ready to serve (at least 5–10 minutes).

Prepare work station: Arrange a cutting board with a very sharp knife, a plate chilled over a bowl with ice water (to place slices on), and a handheld culinary torch (preferred) or a heavy cast-iron skillet set to very high heat. Have an extra tablespoon neutral oil ready.

Torch method (recommended)

Brush the tuna lightly with the extra 1 tablespoon neutral oil. Using the culinary torch, move the flame continuously along the surface of the loin to sear all sides evenly until a thin browned crust forms, about 30–60 seconds per side depending on flame intensity. Rotate the loin so all faces (top, bottom, and edges) get a quick, even char without cooking into the center. Aim for a 1–2 mm crust while keeping the core cool and raw.

Pan-sear alternative

If using a skillet: heat the pan until it just begins to smoke over high heat. Add 1 teaspoon neutral oil to the pan and sear the tuna, pressing gently to ensure contact, for 10–15 seconds per side to form a quick crust. Sear the edges for 5–10 seconds. Do not cook through; the center should remain raw and cool. Transfer immediately to the chilled plate to stop carryover cooking.

Rest briefly: Allow the seared loin to rest on the chilled plate for 1–2 minutes so the surface cools slightly and juices settle — this preserves a cool raw interior.

Slice thinly: Using a very sharp long-bladed knife, slice the tuna across the grain into 1/8–1/4 inch (3–6 mm) thin slices. Wipe the knife between passes to keep slices clean and even.

Arrange slices: Fan the slices in a single layer on a shallow chilled plate or a serving platter, leaving space between pieces so the ponzu can pool evenly beneath.

Finish with ponzu: Spoon or gently pour the citrus ponzu around and lightly over the tuna slices so they sit in a shallow pool, not completely soaked. Use enough so each bite has a citrus-soy balance (about 2–3 tablespoons of ponzu per serving plate).

Prepare garnishes: Very thinly slice 3 radishes (use a mandoline or sharp knife) and thinly slice 2 scallion stalks on the bias. Lightly toast 1 teaspoon sesame seeds in a dry skillet over medium heat until aromatic, about 1–2 minutes, and remove from heat.

Plate garnishes: Scatter the radish slices artfully over and around the tuna, sprinkle the scallions evenly, and add a few microgreens or mitsuba if using. Drizzle 1/2 teaspoon toasted sesame oil in a few tiny drops across the slices for fragrance.

Final touches: Grate a scant 1/2 teaspoon fresh ginger over the top if desired and finish with the toasted sesame seeds. Serve immediately so the contrast of smoky exterior and cool raw center remains pronounced.