Add the apple, onion, carrot, celery, garlic and thyme to the casserole and cook over moderate heat until beginning to brown, about 6 minutes. Add the tomato paste and cook, stirring, until it deepens in color, about 2 minutes. Add the wine and bring to a boil. Add the chicken stock, vinegar and honey and bring to a simmer. Add the pork, cover and transfer the casserole to the oven. Braise the pork for about 3 hours, turning once halfway through, until very tender.