Melt butter or ghee in a large heavy pot and sauté onions and celery till tender.  Add optional wine and bring to a simmer.  Add stock, tomato paste, carrots, potatoes,  garlic, and spices.  Bring to a boil and then turn down heat to medium.  Cook covered for about 15 to 20 minutes until vegetables are tender-crisp.  Add the parmesan and seafood and cook until fish is just done, about 5 minutes.

Note: I always encourage everyone to use as much local, grown without chemicals ingredients (organic), and meat, eggs and dairy from animals that were/are free-ranging and were/are raised without hormones and antibiotics.  Seafood should be wild from unpolluted waters.