Roast the beef bones in a 350°F oven for 45–60 minutes.
While the bones are roasting, sauté the chopped onion in olive oil or tallow over low heat. When the onion begins to become translucent, add the minced garlic and sauté a minute or two longer.
Add the remaining ingredients, including the roasted bones when they are done, making sure to add every last drop of drippings from the pan to the tomato sauce.
Simmer slowly for several hours. The gelatin from the bones and the chicken feet will help to thicken the tomato sauce and give it wonderful flavor.