Place all ingredients in lg stockpot. Fill pot with water to c. one inch below rim.
Bring to boil over high heat. Reduce heat and simmer until vegetables are soft, approx. 3-4 hours, adding water from time to time if starting to simmer down.
Remove lg. pieces of chicken and vegetables with slotted spoon and discard. Strain broth into fresh pot. Bring to boil over high heat. Reduce heat. Simmer down to one-half to two-thirds volume, approx. 1-2 hours.
Use immediately or let cool and freeze.