Savory Herb-Crusted Tuna Steaks

Why This Savory Herb-Crusted Tuna Steaks Works

Patting the tuna dry and seasoning it first lets the salt sit right on the surface of the fish. During searing, that dry, seasoned outside browns fast and forms a thin crust. That crust keeps the inside of the tuna moist and soft instead of drying out. The chopped rosemary, thyme, and garlic pressed onto the fish cling to that surface as it browns, so they toast a little and stick to the tuna instead of falling off into the pan.

As the tuna sears in hot olive oil, the outside firms up while the middle stays tender. After both sides have a crust, the heat is lowered and the white wine and lemon slices go in. The wine bubbles and thins out the browned bits in the pan, and the lemon softens and gives off juice. By the time the tuna comes off the heat, a quick rest lets the juices settle inside the steaks. The butter on top slowly melts over the warm fish and pan juices, so the outside stays glossy and the tuna stays moist when sliced.

Mistakes To Avoid

Letting the tuna cook too long is the fastest way to ruin this dish. The steaks go from moist and tender to dry and chewy in just a minute or two, and the center turns dull and gray instead of staying slightly pink. The crust might look fine, but the fish will feel tough and stringy when cut.

When the pan isn’t hot enough before the tuna goes in, the herbs and garlic sit in warm oil and start to steam instead of sear. The crust never really sets, the tuna turns pale and a bit soggy on the outside, and the herbs can taste flat and soft instead of crisp.

Adding the wine too early, before the crust has formed, cools the pan and stops the sear. The tuna then poaches in the liquid, so the outside stays soft and wet, and the steaks lose that firm, browned edge the recipe depends on.

Skipping the resting time means the juices inside the tuna don’t have a chance to settle. Cutting into the steaks right away lets liquid run out onto the plate, leaving the pieces drier and more crumbly.