In small bowl, mix oil, garlic, sage, thyme, or 1/2 tsp crumbled dried sage and thyme) salt and pepper; rub all over roast. Cover and refrigerate for 2 hours. (Make-ahead: Refrigerate for up to 24 hours.).
Place roast on rack in roasting pan. Roast in 375°F (190°C) oven (or 350°F/180°C in convection oven) until meat thermometer inserted into centre registers 160°F (71°C), about 1 hour and 30 minutes. Transfer to cutting board; tent with foil and let stand for 15 minutes before slicing.
Cider Cream: Meanwhile, skim fat from pan juices. Add butter and melt over medium heat; fry apples and onion, stirring often, for 5 minutes. Add cider and bring to boil, scraping up any brown bits. Stir in stock, cream and mustard; boil until reduced by half, about 8 minutes.
In small bowl, combine cornstarch with 1 tbsp (25 mL) cold water; whisk into sauce and cook, stirring, until thickened, about 1 minute. Serve with pork. Serves 8.