Step 1

Combine all ingredients in a large stock pot and bring to a boil.

Step 2

Reduce temperature and let simmer for four hours. From time to time, with a skimmer, remove the gray foam that appears on the surface of the broth.

Step 3

Filter the broth with a sieve. For a clearer broth, you can add cheesecloth or a coffee filter to the sieve. Discard the remaining ingredients.

Step 4

Let cool 30 minutes, then refrigerate for a few hours to form a layer of fat on the surface of the broth. Remove the fat from the cooled broth.

Step 5

Divide the broth and freeze in containers, if desired.