Ingredients:

1 pound boneless beef top sirloin steak, cut 3/4-inch thick
2 tablespoons chopped fresh Italian parsley leaves
2 cloves garlic, minced
1/2 teaspoon ground black pepper
1 large red onion
1 tablespoon olive oil
Salt (optional)
1/4 cup dry red wine
1 1/2 pounds new potatoes, steamed

Method:

1. Cut steak in half lengthwise and then crosswise into 1/2-inch thick strips. In medium bowl, combine beef, parsley, garlic and pepper; toss to coat. Set aside.
2. Cut onion into 1/4-inch thick slices; separate into rings. In large nonstick skillet, heat oil over medium-high heat until hot. Add onion; cook and stir 3 to 5 minutes or until crisp-tender. Remove to serving platter; keep warm.
3. In same skillet, add beef and stir-fry 2 minutes or until outside surface is no longer pink. Season with salt, if desired. Place beef on top of onion.
4. Add wine to skillet; cook and stir until browned bits attached to skillet are dissolved and liquid thickens slightly. Pour sauce over beef. Serve with potatoes.