1/3 c. lemon juice
1 1/2 c. oil
3/4 c. soy sauce
1/4 c. Worcestershire sauce
2 tbsp. prepared mustard
2 1/2 tsp. seasoning salt
1 tbsp. pepper
1/2 c. vinegar
1 1/2 tbsp. dried parsley flakes
1/2 tsp. garlic powder

Mix well and marinate steak of your choice several hours or overnight. Sauce may be used a second time.