2tablespoonsavocado oilfor frying; can skip if using a well-seasoned cast-iron skillet.
Instructions
To make the sauce, whisk together the sauce ingredients in a small bowl. Let sit at room temperature while you cook the fish.
Season the tuna steaks with salt and pepper on both sides.
Heat a heavy-bottomed pan over medium-high heat for about 3 minutes. Add the oil and swirl to coat.
Place the tuna in the hot pan. Cook until a golden crust has formed and the fish is medium-rare (red warm center), about 2 minutes per side.
Transfer the tuna steaks to a cutting board. Cut them into 1⁄4-inch-thick slices and serve with the sauce for dipping.
Video
Notes
How long you cook the fish depends on how thick it is and on how hot your stove/pan gets.
As a general rule, a 1.5-inch-thick tuna steak should be cooked for about 2 minutes per side over medium-high heat. A thinner steak (¾ to 1 inch) will need just 1-1.5 minutes per side.
This is the type of recipe where there's no escaping the need to be flexible, loosely follow the recipe but stay very aware of what's happening in your own kitchen with your own ingredients and equipment.