Place meat in a deep bowl. Add wine, bay leaf, garlic, salt and pepper. Refrigerate several hours, turning frequently (I take this to mean every 15-20 minutes, but you can do as you like). Drain meat, reserving marinade, and brown on all sides in hot olive oil. Tie remaining ingredients, except the onion and carrot, into a cheesecloth bag. Place the onion and carrot in the bottom of a crockpot. Place the meat, marinade and filled cheesecloth bag on top of the vegetables in the crockpot. Cover and cook on low 8 hours. Discard the herb bag and remove meat to a hot platter. Thicken gravy with arrowroot or cornstarch mixed with a little cold water, using 1/2 tablespoon to one cup broth. Boil 2 minutes. Serve sauce over meat with vegetables arranged attractively around it on the platter.