How to Make It
Step
Combine all of the ingredients in a large stock pot and bring to a boil. Reduce the heat to moderately low and simmer, skimming as necessary, until the stock is flavorful and reduced to 12 cups, about 3 hours. Strain the stock and skim off the fat.
Make Ahead
The stock can be refrigerated for up to 3 days or frozen for up to 3 months.