Winter is the ideal time for nourishing the kidneys, and Beef Bone Marrow Broth is the perfect winter food. Bone broth is prepared in cultures around the world as a tasty, healthful soup and medicinal food. The prolonged cooking of bones in water results in a broth rich in nutrition that promotes strength, tones the blood, and helps to prevent bone and connective tissue disorders. This is a great way to use the ribs of kale, that are often discarded when cooking.
* An acid such as vinegar is necessary in order to extract the minerals and nutrients from the bone into the soup. Lemon juice may be substituted for the vinegar.