Break carrots and celery into large pieces sprinkle among the bones ditto with the onions
Roast for 30 to 45 minutes until meat bones and vegetables begin to brown even turn a little
Dump these into a deep stock pot Pour about a half inch of water into the roasting pan dissolve any bits which have stuck to the bottom of the pan Pour over bones
Add more water to several inches above bones
Bring to a boil stir in tomato paste
Add parsley thyme peppercorns and garlic
Cook barely simmering for several hours adding more hot water as necessary
Strain and boil slowly until reduced and flavor is intensified
Allow to cool skim any fat from the top Refrigerate tightly covered or freeze