San Francisco Cioppino

Name: San Francisco Cioppino
Ingredients: 1/4 cup (2 fl. oz./60 ml) extra-virgin olive oil; 1 large yellow onion, coarsely chopped; 1 large carrot, coarsely chopped; 1 large fennel bulb, coarsely chopped; 3 celery stalks, coarsely chopped; Kosher salt; 2 cups (16 fl. oz./500 ml) dry white wine; 4 cups (32 fl. oz./1 l) chicken stock; 4 lb. (2 kg) fish bones, heads and bodies, or fish and shellfish; 3 star anise pods; 2 bay leaves; 2 tsp. peppercorns; 4 fresh thyme sprigs