package (16 oz.) frozen broccoli and red pepper mixture
1/4
cup walnuts, chopped, toasted
1/3
cup soy sauce
1
Tbsp. dark sesame oil
Combine soy sauce and sesame oil. Remove 2 Tbsp. and reserve. Place beef and remaining marinade in plastic bag, turning to coat. Close bag and marinate in refrigerator 15 minutes.
Remove steaks from marinade; discard marinade. Heat large nonstick skillet over medium heat until hot. Place steak in skillet; cook 9-12 minutes for medium-rare to medium doneness, turning once. Remove from skillet; keep warm.
In same skillet, heat 2 Tbsp. water over medium-high heat until hot. Add vegetables, cook 5 minutes or until water is evaporated and vegetables are hot, stirring occasionally. Add reserved marinade; heat through.
Trim fat from steaks; carve into thin slices.
Arrange beef and vegetables on serving platter, garnish with walnuts.