Carefully add the chickpea broth (it may splatter), vegetable scraps (if using), shiitake stems, tamari, brown rice vinegar, and sriracha. Bring to a boil, lower the heat to simmer and cook, covered, for 30 minutes. Reserve the shiitake caps for when you make the pho (recipe below). Remove the pot from heat and let infuse further for at least 30 minutes, or as long as you have (overnight is best, refrigerate if letting infuse overnight). Strain the broth, discarding the solids. Keep the broth in the same soup pot, refrigerated, until ready to make the pho.
Recipe by Golubka Kitchen at https://golubkakitchen.com/new-year-glow-meal-plan-spaghetti-squash/