1 (1 to 1 1/2 lb.) flank steak
1/2 c. vegetable oil
3 tbsp. vinegar
3 tbsp. lemon juice
2 tbsp. Worcestershire sauce
2 tbsp. soy sauce
1 1/2 tbsp. chopped fresh parsley
1 1/2 tsp. salt
2 tsp. dry mustard
1 tsp. ground pepper
1/2 tsp. garlic salt

Combine all ingredients and pour over flank steak in a large shallow container. Cover and chill overnight, turning steak several times. Remove from marinade. Grill over hot coals for 10 to 12 minutes on each side or until the desired degree of doneness. Slice thinly and serve. 4 servings.