Beef Bone Broth
Makes about 3 quarts.
Note: Adapted from "A Good Food Day," by Marco Canora.
• 1 1/2 lb.bone-in beef short rib
• 2 1/2 lb. beef shank or oxtail
• 2 lb. beef knucklebones or neck bones, or a combination of both (or add 1 more lb. beef shank or oxtail)
• 2 tbsp. extra-virgin olive oil
• 2 tbsp. tomato paste
• 1/4 c. apple cider vinegar