Juicy and flavorful meat with oranges, pickled in grape juice. It turns out tender, delicious, elegant. The recipe is good for a holiday when you need a lot to prepare, and no time: the longest here is to slice the meat and onions. This can be done in the morning and leave it to marinate in the refrigerator, and then in a few minutes, add the oranges, put into a form and put it in the oven, where it no longer requires attention.