2 lbs beef
1/3 cup lemon juice
¼ cup worcestershire sauce
2 Tbsp dry mustard
1 cup oil
½ cup red wine vinegar
1/2 cup soy sauce
1 Tbsp black pepper
2 tsp minced garlic
Cut beef into strips for stir fry, or leave whole for steaks on the grill. Combine remaining ingredients in a bowl, and mix well.
To Freeze: Freeze in freezer safe container.
To Reheat: Thaw overnight in the refrigerator. Grill or cook beef as desired. Discard marinade.