Garlic Horseradish Sirloin Roast

Recipe by Derf2440
READY IN: 2hrs 10mins
SERVES: 8-12




  • With a sharp knife tip, cut about 40 slits all over roast.
  • Stuff each slit with a garlic sliver.
  • In a small bowl, whisk together mayonnaise, horseradish, sage, salt and pepper, brush all over roast.
  • Place onions in centre of roasting pan, place roast on top of onions.
  • Roast in 325°F oven until thermometer registers 160°F for medium, about 2 hours.
  • Transfer to cutting board and tent with foil, let stand for 10 minutes before carving.
  • Skim fat from pan juices.
  • Pour in beef stock and Worcestershire sauce, bring to boil, stirring scraping up brown bits.
  • Whisk cornstarch with 1 tablespoon water, whisk into pan and cook, whisking until thickened and glossy, about 2 minutes.
  • Strain and serve with beef.