01 - Place the assorted clean vegetable scraps in a large stockpot.
02 - Incorporate bay leaves, black peppercorns, thyme, and salt into the pot with the vegetable scraps.
03 - Pour in 10 cups of cold water, ensuring the scraps are fully submerged.
04 - Heat the mixture over high heat until boiling.
05 - Reduce the heat to a gentle simmer and cook uncovered for 1 hour, skimming off any foam that forms.
06 - Remove from heat and allow the broth to cool briefly.
07 - Strain the liquid through a fine-mesh sieve or cheesecloth into a large container, discarding solids.
08 - Taste the broth and season further if desired.
09 - Use immediately, refrigerate up to 5 days, or freeze for up to 3 months.