For stuffing:
For roast:
For pan sauce:
Make stuffing:
Preheat oven to 350°F.
Spread bread squares in 1 layer in a shallow baking pan and bake in middle of oven until dry and lightly toasted, about 15 minutes. Leave oven on (for roast) and cool bread.
Cook onion and celery in butter in a 12-inch heavy skillet over moderate heat, stirring occasionally, until softened, 4 to 5 minutes. Stir in apples, sugar, salt, pepper, sage, thyme, nutmeg, and cinnamon. Reduce heat to low, then cook, covered, stirring, until apples are tender, about 15 minutes. Stir in bread squares, parsley, and chives.
Make roast:
Set oven rack in lower third of oven. Sprinkle roast inside and out with salt and pepper and put in a large flameproof roasting pan. Mound stuffing in cavity. Wrap tips of rib bones with foil to prevent burning, then wrap meat below bones with overlapping bacon strips, securing them with wooden toothpicks.
Roast pork in middle of oven, covering stuffing loosely with foil after 30 minutes, until an instant-read thermometer registers 155°F when inserted 2 inches into center of meat (do not touch bones), 2 1/4 to 2 3/4 hours total.
Transfer roast to a carving board and let stand, loosely covered with foil, 15 to 20 minutes. (Temperature of meat will rise to 160°F; meat will be slightly pink.)
Make pan sauce:
Skim fat from pan drippings. Straddle pan across 2 burners and add water, then de-glaze pan by boiling over high heat, stirring and scraping up brown bits. Pour through a fine sieve into a saucepan, discarding solids.
Add jelly and any juices accumulated on carving board, then simmer sauce, whisking occasionally and skimming any fat that rises, until jelly is melted, about 4 minutes. Season with salt and pepper.
Remove all foil from roast and carve into chops by cutting between ribs.
Recipe adapted from Epicurious.com