Ingredients

  • 1 beef flank steak (1/2 pound)
  • 1/3 cup finely chopped onion
  • 1/4 cup olive oil
  • 2 tablespoons lime juice
  • 2 tablespoons red wine vinegar
  • 1 garlic clove, minced
  • 1/2 to 3/4 teaspoon chili powder
  • 1/4 to 1/2 teaspoon salt
  • 1/8 to 1/4 teaspoon ground cumin
  • 2 French rolls, split and toasted
  • 1/2 cup salsa or guacamole, optional

Method

  • Pound steak to 1/4-in. thickness. In a shallow dish, combine the onion, oil, lime juice, vinegar, garlic, chili powder, salt and cumin; add beef and turn to coat. Cover; refrigerate for 8 hours or overnight.
  • Drain and discard marinade. Grill steak, uncovered, over medium heat or broil 4 in. from heat for 3-5 minutes on each side or until meat reaches desired doneness (for medium-rare, a thermometer should read 135°; medium, 140°; medium-well, 145°). Slice meat across the grain. Serve on rolls. Top with salsa or guacamole if desired.