Cut the steak lengthwise in half then crosswise into 1/4-inch-thick strips; set aside. In a medium saucepan, bring the beef broth to a boil. Stir in the couscous, cover, and remove from the heat. in a large nonstick skillet, heat the oil over medium-high heat until hot. Add half the beef at a time and stir-fry for 1 to 2 minutes, or until no pink remains. Remove from the skillet with a slotted spoon; keep warm. In the same skillet, stir-fry the pepper and onion for 2 to 3 minutes, or until crisp-tender. Return the beef to the skillet; stir in the barbecue sauce. Cook for 1 to 2 minutes, or until heated through, stirring constantly. Arrange the beef mixture over the couscous, sprinkle with the chopped parsley, and garnish with the parsley springs. NOTE: Couscous is available near the rice and pasta in the supermarket. NOTES : 4 servings