Ingredients

  • 3 tablespoons olive oil
  • 2 medium red onions, thinly sliced
  • Salt
  • 1 teaspoon chipotle powder or hot paprika
  • 1 teaspoon dried oregano
  • 1 tablespoon red wine vinegar
  • 1 ripe mangopeeled, pitted and cut into 1/4-inch dice
  • 1 medium cucumberpeeled, seeded and cut into 1/4-inch dice
  • 1 serrano or jalapeno chile, seeded and very finely chopped
  • 2 tablespoons fresh lime juice
  • 1 tablespoon chopped cilantro
  • One 1-pound tuna steak (1 inch thick)
  • Eight 6-inch corn tortillas

Method

  • Light a grill or preheat a grill pan.
  • In a large skillet, heat 2 tablespoons of the olive oil.
  • Add the onions, season with salt and cook over moderately high heat until softened and browned, about 8 minutes.
  • Add the chipotle powder and cook for 30 seconds.
  • Add the oregano and the vinegar and cook for 1 minute.
  • Transfer to a plate.
  • Meanwhile, in a bowl, combine the mango, cucumber, serrano, lime juice and cilantro and season the salsa with salt.
  • Oil the grill.
  • Rub the tuna with the remaining 1 tablespoon of olive oil and season with salt.
  • Grill over high heat until lightly charred and pink within, about 3 minutes per side.
  • Transfer to a plate.
  • Grill the tortillas until hot and soft, about 10 seconds.
  • Stack the tortillas and wrap them in foil to keep warm.
  • Thinly slice the tuna and transfer to a platter.
  • Serve with the onions, salsa and tortillas.
  • Let everyone make their own tacos.