01 - Collect and thoroughly rinse all vegetable scraps, removing any dirt or mold.
02 - Place the cleaned scraps in a large stockpot. Add bay leaves, peppercorns, thyme, parsley stems, garlic, and salt.
03 - Pour in 10 cups of cold water, covering the scraps completely.
04 - Heat over medium-high until the liquid reaches a gentle boil, then reduce heat to maintain a simmer.
05 - Simmer uncovered for 1 hour, skimming off any foam that rises to the surface.
06 - Remove from heat and allow to cool slightly before straining through a fine mesh sieve or cheesecloth into a bowl or container, discarding solids.
07 - Taste the broth and adjust salt if necessary.
08 - Transfer broth to airtight containers; refrigerate up to 5 days or freeze up to 3 months.