1. Preheat oven to 450°; lightly rub the beef bones with olive oil and place in a heavy roasting pan. 2. Roast the bones for about 20 minutes; add in the chopped onion; continue roasting 30 minutes, or until bones brown. 3. Remove the bones and onion from the oven; carefully place in a large stockpot with the vegetables, herbs, and spices. 4. Add water to cover by 4 inches; bring to a simmer. 5. Skim off scum and fat until broth is clear. 6. Simmer broth gently for 4 hours; strain the broth. 7. Use immediately or refrigerate for later use. When broth is well chilled, carefully lift off any remaining congealed fat and discard it. ---------------------------------------------------------------------------
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