Pound steak to 1/8-inch thickness. Sprinkle both sides of steak with garlic salt and lime juice. Cover and refrigerate overnight. Drain well; discard marinade.
Place steak on grill; cook over medium heat 8 to 10 minutes on each side, brushing with oil occasionally. Remove from grill, and cut into thin slices. Serve with flour tortillas, Pico de overnight. Yield: about 4 cups. Gallo, and Guacamole.