My wife made asian style oxtails the other day.
First she seasoned them and browned about 4lb of them in a pot. She then deglazed the pan with a little red wine, added some rice wine vinegar, soy sauce, beef broth, garlic, ginger, green onion and lemon grass. She then braised them for 3 hours. She then placed the oxtails in a casserole dish and strained the braising liquid to take out the solids and let that cool in the fridge till the fat congealed and removed it. She then poured the defatted liquid over the oxtails and added an 8 oz pack of shitake mushrooms and popped that in the oven for an hour at 350 F while spooning the broth over the oxtails about every 10 minutes.
She served it over Jasmine Thai rice (the broth became like a gelatin and was to die for) garnished with some green onion with some baby bock choy she broiled. My contribution was a German red wine (dornfeilder) and it was a little bit of heaven on earth.