*Instead of chicken broth, you may fill the beef broth can with red wine or a dry white wine (up to two cups). If using wine, add it after sautéing the tomato paste and before adding the beef broth. Bring it to a simmer for about 2 minutes to mellow the flavor, and then proceed with the beef broth, etc.
A few more things:
•Instead of canned or boxed broth, you may use stock. If unsalted, simply add a little extra seasoning to taste.
•For added depth of flavor, you may add ½ ounce dried porcini mushrooms, chopped, along with the thyme and bay leaf.