Pasture Beef Bone Broth

Pasture Beef Bone Broth

Ingredients:
3 pounds marrow bones from grass-fed organic beef
6 unpeeled carrots, cut into thirds
2 unpeeled yellow onions, cut into chunks
1 leek, white and green parts, cut into thirds
1 bunch celery, including the heart, cut into thirds
4 unpeeled red potatoes, quartered
2 unpeeled Japanese or regular sweet potatoes, quartered
1 unpeeled garnet yam, quartered
5 unpeeled cloves garlic, halved
½ bunch fresh flat-leaf parsley

Directions:
1 8-inch strip of kombu