2 lb bones, chicken or beef, they usually have it in the frozen section at Whole Foods or you can ask your butcher
Green part of the leek
Green part of a fennel
2 sticks of celery
any other vegetable or herbs scraps
2 Tbsp vinegar (to help extract the collagen)
Sea Salt to taste
1 whole onion, unpeeled
4 star anise
2-3 bay leaves
Heat up the oven to broil, place the bones on a baking sheet and brown them in the oven, on all sides. In a large pot (12-16 QT) place everything and fill up with water. Bring to a boil and simmer for 8 hours. I like to leave it in the oven overnight. Cool down and freeze in Ziplock bags or jars. If you are using jars, fill it up to 75% to avoid cracking.
With the weather changing, its a great time for a broth. You can use it as a base for dishes or consume it on its own, you gut, nails, hairs and body will thank you.