Haven't tried it yet but it's here for the future from a cookbook called "Good Yom Tov."
I thought the tomato juice was an interesting ingredient here with the orange juice! I added the word "juicy" to the title because of that!
Place the sliced onions in the bottom of a roasting pan. Place the meat, fat side up on top of the onions in the pan.
Mix the sauce in a bowl by combining the orange juice, tomato juice, red wine and sugar; pour over the meat.
Add the salt, pepper and garlic to taste.
Bake, covered, at 325 degrees F. for 2 1/2 hours. Meat can be turned once if you like. Raise heat to 350 degrees F. and uncover the meat. Continue baking for another hour or until thoroughly cooked and tender.