"Lobster Essence" is simply lobster stock (or broth) which we make by simmering together lobster bodies, carrots, celery, onion & fresh herbs for a few hours. We then strain it once and then run it through a coffee filter to make it less cloudy. Chill and keep for one week, refrigerated. (I usually make a large batch and freeze it in quart containers to be handy when needed.)
Then make your dirty martini as you normally would, replacing the olive juice with a healthy dose of lobster essence - then garnish the drink with a lobster claw and a twist of lemon.