Add all ingredients to a pot. Bring to a bare simmer on med-high heat.
Continue cooking, covered, for 20 minutes.
Strain broth through a fine sieve. Use the stock right away or transfer into 4, 1-quart sized jars, sealing their lids. Store up to 5 days or freeze for 6 months.
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Notes
Experiment with different greens and herbs, and don't be afraid to add your favorite protein or other ingredients to make it your own. With its fresh and vibrant flavor, Green Broth is a dish that you'll want to enjoy again and again.