Place all ingredients and 1 gallon water in a large pot. Bring to a boil over high heat. Reduce to a simmer and cook 1-2 hours. Let cool, then strain and compost solids. Cool and refrigerate for up to 3 days. Stir before using if broth separates.
Tip: If you're short on time but want to make the veggie broth, simply throw your scraps in a ziplock or plastic bag and place in the freezer. When you have the time, take them out of the freezer and make the broth.
Recipe Adapted From: Whole Foods Market