Roasted Beef Broth

Beef bones (grass feed recommended, mixture of ribs and meaty bones with a lot of collagen, about 6-7 pounds total)

olive oil

kosher salt

large onions (chopped)

celery stalks (leaves included, chopped)

large carrots (peeled and chopped)

tomato paste

head of garlic (outer papery skin removed, bottom chopped off to expose the cloves but leaving the head in tact (as if you were roasting it))

freshly ground pepper

fresh thyme

bay leaves