Ingredients 

• 3 pounds fish heads and bones
• 1 quartered onion
• 1 whole carrot
• 2 leeks cut up
• 1 bunch parsley
• 2 bay leaf
• 2 cup white wine
• 1 teaspoon black peppercorns
• 1 teaspoon ground thyme

Method

Place all ingredients in a pot, and cover with water by at least one inch. Bring to a boil , skimming off the foam on top. Add the white wine, reduce heat , leave to simmer for one hour. Let stand for ten minutes, then strain.