Remove all excess fat from the oxtail then debone leaving all the meat intact (bones can be used for stock.) Roll the oxtail back up with caul fat (optional) and tie with butchers twine about 1 inch apart. In a very hot roasting pan sear off the oxtail on all sides then remove. In the same pan roast off the mirepoix then add the red wine, reduce, and add the stock, bring to a simmer. Add the oxtail back in and cover with foil and place into a preheated 325-degree oven and braise for approximately 2 hours. When oxtail is tender remove pan from the oven and remove the oxtail and cool. Strain the braising liquid and reduce to a sauce consistency, check seasoning. Slice the oxtail into 2-inch logs, reheat in the sauce. Remove the butcher's twine, slice and serve.