How to Make Slow Roasted Beef Sirloin (Spoon Roast)

Gather the ingredients. Heat the oven to 425 F. Line a roasting pan with foil and place a rack in the pan. The Spruce In a small bowl combine the minced garlic with the chili powder, cumin, salt, black pepper, and cayenne pepper. The Spruce Put the roast in the prepared pan and rub it on all sides with the olive oil. Rub the seasoning mixture all over the roast. The Spruce Roast the beef in the preheated oven for 15 minutes. Reduce the oven temperature to 225 F and continue roasting for about 3 hours longer (about 45 minutes to 1 hour per pound), or until done as desired. The Spruce For medium-rare, the beef should register from 130 F to 135 F on a meat thermometer or oven probe placed in the thickest part of the roast. The Spruce Tent the roast loosely with foil and let it rest for 10 minutes before slicing. The Spruce Slice and serve with your choice of sides.