1 c. oil
1/2-3/4 c. soy sauce
4 tbsp. Worcestershire sauce
2 tbsp. mustard
2 tsp. salt
2 tsp. pepper
2 tsp. fresh parsley, minced
1/2 c. vinegar
4 garlic cloves, diced
Fresh basil, minced
1/4 c. lemon juice
3 tbsp. ketchup

Mix ingredients together. Puncture London Broil, on both sides, with fork. Marinate meat for one day (overnight or AM-PM) in refrigerator.