Preheat oven to 350 degrees. Make slits in pork roast; insert garlic sliver into each slit. Combine herbs, salt, and pepper; pat onto roast. Place onions in bottom of roasting pan. Place pork (fat side up) and potatoes on top of onions. Bake 1 hour.

Mix together cider and AppleJack; pour around pork. Add prunes to pan. Cover with foil and bake for 1 hour. Place apples around pork; cover and bake for 15 minutes, or until thermometer registers 170 degrees. Transfer pork and potato-fruit mixture to platter; keep warm.

With spoon, remove fat from surface of liquid in roasting pan. Place on stove; bring to a boil until reduced to 1 1/2 cups, about 5 minutes. In cup, blend flour with cream, pour into boiling liquid in roasting pan, whisking constantly, until it boils and thickens, about 2 minutes.

Serve sliced pork with potatoes and fruit. Pour gravy over.