Ingredients:

  Amount  Measure       Ingredient -- Preparation Method
--------  ------------  --------------------------------
   2      tablespoons   vinegar
   2      tablespoons   brown sugar
     1/4  cup           lemon juice
   1      cup           ketchup
   3      tablespoons   Worcestershire sauce
     1/2  tablespoon    mustard -- (any creamy kind)
                        salt & pepper to taste
     1/2  cup           cooking oil
   3      tablespoons   soy sauce
     1/4  cup           bottled French dressing
                        onion salt to taste
                        garlic salt to taste
                        meat tenderizer 1/2 t per lb of meat

Preparation:

Mix well. Marinate meat for a minimum of four hours. Here is the absolute best meat marinade I have ever had...I found it in "Delicious Decisions" the cookbook of the Jr. League of San Diego. I find that very, very inexpensive London Broil (even bottom round and shoulder) is almost butter tender when marinated in this overnight then grilled (although broiling is almost as good). Slice thin across the grain and you'll surely impress guests