Ingredients

  • 3 large onions, peeled and cut lengthwise into wedges, leaving root ends intact
  • 1/4 cup olive oil
  • Kosher salt and freshly ground black pepper
  • 1/4 cup balsamic vinegar
  • 1/3 cup fresh lime juice
  • 3 pounds skirt steak
  • 1 tablespoon ancho chili powder
  • 1 tablespoon ground cumin
  • 1 tablespoon ground coriander
  • 24 flour tortillas
  • 1 1/2 cups fresh cilantro
  • Roasted Tomatillo Salsa, recipe follows
  • Special Equipment: Metal skewers or a grill basket
  • 3 pounds fresh tomatillos or 6 (11-ounce) cans tomatillos
  • 10 fresh serrano chiles
  • 6 garlic cloves, unpeeled
  • 2 onions, cut into wedges
  • 1 cup fresh cilantro leaves
  • 1 tablespoon plus 1 teaspoon kosher salt
  • 2 teaspoons freshly squeezed lime juice

Method

  • Prepare grill for cooking.
  • Thread onions onto skewers (or put in grill basket), then brush with 1 tablespoon oil and season with salt and pepper.
  • When fire is medium-hot (you can hold your hand 5 inches above rack for 3 to 4 seconds), grill onions, turning occasionally, until tender, 16 to 20 minutes.
  • Transfer to a cutting board.
  • When just cool enough to handle, cut onions into 1-inch pieces and toss with vinegar in a bowl.
  • Season with salt and pepper.
  • While onions are grilling, stir together the lime juice and remaining 3 tablespoons oil in a shallow dish, then add steak and marinate at room temperature, turning once, 10 minutes.
  • Pat steak dry, then rub with chili powder, cumin, and coriander and season with salt and pepper.
  • Grill steak on lightly oiled grill rack, turning once, 6 to 10 minutes total for medium-rare.
  • Transfer to cutting board, then let stand 5 minutes before cutting diagonally into thin slices.
  • While steak is standing, toast tortillas directly on grill rack, turning once, until puffed slightly and browned in spots, about 1 minute total.
  • Serve steak, onions, cilantro, and salsa all wrapped in tortillas.
  • Cook's note: If you aren't able to grill, onions (no need to skewer) and steak can be cooked in a lightly oiled well-seasoned ridged grill pan over moderately high heat and tortillas can be toasted over gas (hold with tongs) or directly on top of electric burners.
  • Cut skirt steak into pieces to fit in grill pan and grill in batches without crowding.
  • Preheat broiler.
  • If using fresh tomatillos, remove husks and rinse under warm water to remove stickiness.
  • If using canned tomatillos, drain and measure out 4 cups.
  • Broil fresh tomatillos (do not broil canned), chiles, garlic, and onions on rack of a broiler pan 1 to 2 inches from heat, turning once, until softened and slightly charred, about 8 minutes.
  • Peel garlic and pull off tops of chiles.
  • Puree all ingredients in a food processor.
  • Cook's note: Salsa can be made 1 day ahead and chilled, covered.
  • Yield: 6 cups