Place beef steak in plastic bag; add marinade ingredients, turning to coat. Close bag securely and marinate in refrigerator 20 to 30 minutes, turning once.
Wrap tortillas securely in heavy-duty aluminum foil. Meanwhile in medium bowl, combine Pico de Gallo ingredients; mix well.
Remove steak from marinade; discard marinade. Place steak on grid over medium ash-covered coals. Grill top round steak, uncovered, 8 to 9 minutes (10 to 12 minutes for top sirloin steak) for medium-rare to medium doneness, turning occasionally. During last 5 minutes, place tortilla packet on outer edge of grid, turning occasionally.
Trim fat from steak; carve crosswise into very thin slices. Garnish with lime and cilantro, if desired.
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