For the Broth
Shrimp broth is simple to make, and brings rich flavor to this dish. To prepare the broth, place reserved shrimp shells in a medium-size saucepan. Coarsely chop onion, add to shells, and add water to just cover. Bring to a boil, reduce heat and simmer for 20 to 30 minutes to reduce and concentrate flavors, then strain. Yields about 1 cup of broth. If you want to make this delicious shrimp broth even more flavorful, you can add fresh herbs such as thyme, bay leaf or parsley to the simmering water.