Cut the oxtail into small pieces. Remove excess fat.
Fry on all sides in hot fat.
Place in a casserole.
Add the fried onion and carrot. Mix in the flour.
Add tomato puree, brown stock, garlic and season.
Bring to boil, skim.
Cover with a lid and simmer in the oven till tender for about 2 hours.
Remove the meat from the sauce, place in a clean pan.
Serve sprinkled with chopped parsley.
Notes
To thicken gravy, you can add a few slices of potatoes and cook it for a longer time. It thickens up if you cook it longer. If you want you can marinate the oxtail over night.