1 lb. steak, cut into strips
1/3 c. Lea & Perrins worcestershire sauce
2 tbsp. brown sugar
1 tbsp. dijon mustard
1 tbsp. vegetable oil
1 bag stir fry vegetables

Marinate steak for 30 minutes with worcestershire sauce, brown sugar and dijon mustard.

Heat oil in skillet and brown steak. Remove steak. Stir vegetables until tender. Return steak and reserved marinade and cook 1 minute.