01 - Wash and chop carrots, celery, onion, leek, parsnip, and garlic into large chunks.
02 - Place all prepared vegetables in a large stockpot along with parsley, thyme, rosemary, bay leaves, peppercorns, and salt.
03 - Pour in 8 cups cold water, ensuring all ingredients are completely submerged.
04 - Heat pot over medium-high heat until broth reaches a rolling boil.
05 - Reduce heat to gentle simmer and cook uncovered for 1 hour, skimming foam from surface occasionally.
06 - Remove from heat and strain through fine-mesh sieve, discarding all vegetable solids.
07 - Taste broth and adjust salt if desired. Cool completely before refrigerating or freezing.