I think the problem with oxtail is that the recipes are not really sw-friendly but you limit thedamage.
Dredge the pieces in seasoned flour and brown in a pan. You'll have to syn the flour and oil. Brown a load of onionsand garlic and add to the meat in a casserole. Add some tomato paste and beef stock, herbs of your choice and cook in slow oven for three or four hours. Cool it and put in the fridge over-night. The next day, scrape off any fat tat has risen tothe surface. Dishes like that always taste better the next day.