01 - Place the assorted vegetable scraps in a large stockpot.
02 - Incorporate bay leaves, black peppercorns, thyme, and salt into the pot.
03 - Pour 10 cups of cold water over the ingredients ensuring they are fully submerged.
04 - Bring mixture to a boil over high heat, then reduce heat to maintain a gentle simmer.
05 - Simmer uncovered for 1 hour, occasionally skimming off any foam that forms at the surface.
06 - Remove from heat and let the broth cool briefly before straining.
07 - Strain the liquid through a fine-mesh sieve or cheesecloth into a large bowl or container, discarding solids.
08 - Taste the broth and adjust salt if necessary.
09 - Use broth immediately or allow it to cool completely before refrigerating for up to 5 days or freezing for up to 3 months.