Chicken Marbella is tasty on its own, but is excellent over farro, rice pilaf, couscous, or paparadelle noodles. It's also terrific the next day.
Into your slow cooker, stir together the olive oil, vinegar, prunes, olives, capers w/brine, bay leaves, garlic, oregano, salt, pepper, 2 tbsp brown sugar, and wine. Nestle the chicken pieces into the pot. Cover and cook until the chicken is very tender, about 4 hours on high and 7 hours on low. If possible, turn the chicken pieces over halfway through and spoon some of the juices over everything. Taste the broth and stir in the remaining tbsp brown sugar, if desired. It will dissolve in the hot broth. Transfer to a shallow bowl and scatter the parsley over the top.