Ingredients

  • Two 6-ounce tuna steaks, cut 1 1/4 inches thick
  • Kosher salt
  • 4 tablespoons unsalted butter
  • 1/4 cup extra-virgin olive oil
  • 2 tablespoons fresh lime juice
  • 1 small jalapenostemmed, seeded and minced
  • 4 kumquats, thinly sliced
  • 1/4 cup mint leaves, torn

Method

  • Season the tuna steaks with salt.
  • In a medium saucepan, melt the butter in the olive oil and lime juice.
  • Stir in the minced jalapeno and sliced kumquats.
  • Add the tuna steaks and cook them over moderate heat, turning once, until they're rare, about 4 minutes.
  • Transfer the tuna steaks to a carving board and slice them 1/3 inch thick, then arrange them on plates.
  • Stir the torn mint into the sauce, spoon over the tuna and serve.