Bone Broth

Directions

1. 1
   Preheat oven to 400 degrees F (200 degrees C). Spray a roasting pan with cooking spray.
2. 2
   Spread tomato paste onto beef bones and place in the prepared roasting pan.
3. 3
   Bake in the preheated oven until bones begin to brown, about 30 minutes.
4. 4
   Transfer bones to a slow cooker and pour in enough water to cover bones. Add onions, carrots, garlic, and bay leaves to broth mixture.
5. 5
   Cook on Low for at least 24 hours.
6. 6
   Strain broth through a fine-mesh strainer into a container and refrigerate.