Ingredients

  • 3 tablespoons soy sauce
  • 2 tablespoons water
  • 1 tablespoon fresh lime juice
  • 1/2 teaspoon grated peeled ginger
  • 1/2 teaspoon sugar
  • 1 scallion green, thinly sliced
  • 2 1/2 teaspoons black peppercorns
  • 1/2 teaspoon white peppercorns
  • 1 teaspoon coriander seeds
  • 2 pounds tuna steaks (1 inch thick)
  • 2 tablespoons vegetable oil

Method

  • Stir together soy sauce, water, lime juice, ginger, sugar, and scallion.
  • Coarsely crush peppercorns and coriander with a mortar and pestle or heavy skillet. Sprinkle tuna with 3/4 tsp salt, then press spice mixture evenly all over fish.
  • Heat oil in a 12-inch heavy skillet over medium-high heat until it shimmers, then sear tuna, turning once, about 6 minutes for medium-rare.
  • Serve with dipping sauce.