Rich and delicious seafood bisque! I use chicken broth because it's cheap and easy to find, but if you are so inclined, you could use fresh lobster stock or 3 ounces of Glace de Fruits de Mer Gold reconstituted in 4 cups of hot water.
My boyfriend and I just finished having this for dinner -- wonderful!! I had to tweak the original recipe, and what follows is the end result. I'm sure the crust could actually be used on all kinds of fish -- Chilean sea bass is pretty expensive (ours was almost $30/lb), but you could likely substitute any kind of white fish with good results.