Seared Maine Bluefin Tuna Recipe

Bring tuna to temperature and season

Remove the bluefin loin from the refrigerator 20–30 minutes before cooking so it comes closer to room temperature; this promotes even searing. Pat the tuna dry on all sides with paper towels. Lightly season all sides with the kosher salt and freshly ground black pepper, pressing gently so the seasoning adheres.

Sear the tuna

Heat a heavy skillet (cast-iron or stainless steel) over high heat until it is very hot, about 3–4 minutes. Add the neutral oil and swirl to coat. Carefully place the tuna loin in the pan and sear without moving for 45–60 seconds to develop a dark brown crust. Flip and repeat on the second side for 45–60 seconds. For 1–1¼ inch thick loin, sear the narrow edges 15–20 seconds each so the tuna stays rare to medium-rare in the center. If you prefer more cooked, add 30–45 seconds per side, but be careful—bluefin is best slightly rare in the center.

Finish with butter and rest

Lower the heat to medium. Add the unsalted butter to the pan and tilt the pan, spooning the melted butter over the top of the tuna for 15–20 seconds to add gloss and flavor. Transfer the tuna onto a cutting board and let it rest for 3–5 minutes to allow juices to redistribute.

Slice and dress

Slice the tuna crosswise into ¼–½ inch slices using a very sharp knife. Arrange on a warmed platter or individual plates. Zest the lemon over the sliced tuna and squeeze a few drops of lemon juice across the top to brighten flavors. Scatter microgreens or baby arugula around or atop the tuna as garnish.

Make the glaze

While the tuna comes to temperature (or while the pan heats), whisk together in a small bowl the low-sodium soy sauce, mirin, rice vinegar, dark sesame oil, sugar or honey, grated ginger, and minced garlic until the sugar dissolves and the mixture is homogeneous. Stir in the toasted sesame seeds.

Reduce (optional) and finish

For a slightly thicker glaze, pour the mixture into a small saucepan and simmer over low heat for 2–3 minutes until slightly reduced and glossy. Remove from heat and let cool briefly. Taste and adjust: add a touch more mirin or sugar for sweetness, or a few drops of rice vinegar for brightness if needed.

Plate with glaze

Drizzle the glaze sparingly over the seared tuna slices or serve alongside in a small dish for dipping, ensuring each slice receives a light coating so the sear remains visible and the fish is not overwhelmed.

To serve, scatter the thinly sliced scallions and pickled ginger over and around the tuna for textural contrast and palate cleansing. Offer a small smear or dollop of wasabi on the plate for guests who want heat. If you prepared the glaze to be more reduced, a light sprinkle of extra toasted sesame seeds and a final pinch of flaky sea salt (optional) over the tuna heightens the finish.