Good fish stock is the first step to delicious soups, stews and chowders. Use fish trimmings or lobster and shrimp shells add lots of flavor to the stock. This recipe comes from Slapfish restaurant in California.
Place the trimmings, peppercorns, celery, tomatoes, shallots, bay leaves, carrots, lemon juice, parsnip, fennel, mushrooms, water, clam juice, fish sauce, wine, and thyme in a large pot and bring to a simmer. Simmer for 20 minutes.
Strain, and then set aside for use in soup or stew.