Worcestershire sauce
There are many variations spun off of the basic ingredients. One recipe uses one cup of chopped onion, celery, and carrot as well as diced pork hocks and a dash of Worcestershire sauce. Another uses white fish fillets (either cod, grouper, tilefish, or snapper), onions, carrots, celery, minced garlic, unsalted butter, bay leaf, thyme, allspice, Worcestershire sauce, black rum and sherry pepper sauce. Other types of fish can be used like rock fish or sea bass.