Known as ruthang in Tibetan cuisine, this rich bone broth builds a deeply savory foundation for soups and stews. While traditionally made by simmering yak bones, this version uses oxtail or beef shank to achieve the same robust flavor. Fresh ginger and an optional star anise add a subtle aromatic warmth to the liquid. Keeping a batch of this broth in the freezer ensures you always have a comforting base ready for cold weather cooking.