Here is one recipe I recently developed that I found delicious.
Braised Oxtail in Red Wine and Mushroom Sauce
6 pounds of oxtail cut 1 1/2 to 2 inches thick
2 cups Red Wine
2 cups of sweet onions such as Walla Walla sliced 1/4 inch
4 cups of assorted mushrooms chopped and sliced--shiitakes, criminis, chanterelles, oysters, porcinis and or morels (Use what you can find and experiment. Wild are best.)
2 cups of good beef broth
1/2 teaspoon fresh ground Black Pepper
4 teaspoons Kosher Salt
1/4 cup Olive Oil
2 tablespoons Parsley, coarsely chopped
Brown off oxtails in a large, heavy dutch oven. When browned, remove oxtail pieces with tongs. Add onions, mushrooms, celery, carrots and bay leaf to oil. Saute until tender. Add oxtail back into vegetables. Add wine beef broth and wine. Bring to a boil, cover, reduce heat to a simmer and cook on stove top for 3 hours or until the meat is nearly falling off the bone.
Uncover, tilt the dutch oven slightly, and skim as much fat as possible using a bulb baster or ladle. Remove the meat to a plate and keep warm. Remove bay leaf. Bring heat back up to high and reduce the pan sauce until thickened. Adjust salt and pepper to taste.
Serve oxtails over pasta or mashed potatoes and pour sauce over oxtails. Serve sprinkled with the chopped parsley.