Flank steak is generally cooked to medium-rare so it stays tender and juicy.
Sprinkle flank steak evenly with salt and pepper.
Cook steak in hot oil in large skillet over medium-high heat 6 to 8 minutes on each side or to desired degree of doneness.
Remove steak, and drain, reserving 1 tablespoon drippings in skillet; add garlic, and sauté 1 minute. Add wine, tomatoes, olives, and vinegar; cook 10 minutes or until reduced by half. Stir in parsley.
Cut steak diagonally across grain into thin slices, and serve with tomato mixture. Garnish, if desired.
The Best of Mr. Food: Dinner on the Double